The sum of twice a number and seven :
In general ,twice means a number multiplied by 2 .the sum of twice a number means a number multiplied by 2 +7.in other words,Sum of twice a number and seven means ,the product of number by 2 plus seven.
For example : Let us consider the unknown number x,y,z, The expression should becomes 2x+7,2y+7,2z+7
Example Problems to Find Sum of Twice a Number and Seven :
Example 1:
The sum of twice a number and seven is 19.Find the number ?
Solution:
The sum of twice a number and 7 is 19.
Let us consider the unknown number is x,
Write this sentence into equation,we get,
2x+7 =19
Subtract 7 on both sides, 2x+7-7=19-7
2x=12
Divide both sides by 2,x=`12/2`
x=6
Therefore the unknown number x=6
Example 2:
The sum of twice a number and seven is 17.Find the number ?
Solution:
The sum of twice a number and 7 is 17.
Let us consider the unknown number is x,
Write this sentence into equation,we get,
2x+7 =17
Subtract 7 on both sides, 2x+7-7=17-7
2x=10
Divide both sides by 2,x=`10/2`
x=5
Therefore the unknown number x=5
Example 3:
The sum of twice a number and seven is 53.Find the number ?
Solution:
The sum of twice a number and 7 is 53Let us consider the unknown number is x,
Write this sentence into equation,we get,
2x+7 =53
Subtract 7 on both sides, 2x+7-7=53-7
2x=46
Divide both sides by 2,x=`46/2`
x=23
Therefore the unknown number x=23
Example 4:
The sum of twice a number and seven is 121.Find the number ?
Solution:
The sum of twice a number and 7 is 121
Let us consider the unknown number is x,
Write this sentence into equation,we get,
2x+7 =121
Subtract 7 on both sides, 2x+7-7=121-7
2x=114
Divide both sides by 2,x=`114/2`
x=57
Therefore the unknown number x=57
Please express your views of this topic What is a Composite Number? by commenting on blog.
Practice Problem to Find the Sum of Twice a Number and Seven:
1)The sum of twice a number and seven is 13.Find the number ?
Answer:3
2)The sum of twice a number and seven is 25.Find the number ?
Answer:9
In general ,twice means a number multiplied by 2 .the sum of twice a number means a number multiplied by 2 +7.in other words,Sum of twice a number and seven means ,the product of number by 2 plus seven.
For example : Let us consider the unknown number x,y,z, The expression should becomes 2x+7,2y+7,2z+7
Example Problems to Find Sum of Twice a Number and Seven :
Example 1:
The sum of twice a number and seven is 19.Find the number ?
Solution:
The sum of twice a number and 7 is 19.
Let us consider the unknown number is x,
Write this sentence into equation,we get,
2x+7 =19
Subtract 7 on both sides, 2x+7-7=19-7
2x=12
Divide both sides by 2,x=`12/2`
x=6
Therefore the unknown number x=6
Example 2:
The sum of twice a number and seven is 17.Find the number ?
Solution:
The sum of twice a number and 7 is 17.
Let us consider the unknown number is x,
Write this sentence into equation,we get,
2x+7 =17
Subtract 7 on both sides, 2x+7-7=17-7
2x=10
Divide both sides by 2,x=`10/2`
x=5
Therefore the unknown number x=5
Example 3:
The sum of twice a number and seven is 53.Find the number ?
Solution:
The sum of twice a number and 7 is 53Let us consider the unknown number is x,
Write this sentence into equation,we get,
2x+7 =53
Subtract 7 on both sides, 2x+7-7=53-7
2x=46
Divide both sides by 2,x=`46/2`
x=23
Therefore the unknown number x=23
Example 4:
The sum of twice a number and seven is 121.Find the number ?
Solution:
The sum of twice a number and 7 is 121
Let us consider the unknown number is x,
Write this sentence into equation,we get,
2x+7 =121
Subtract 7 on both sides, 2x+7-7=121-7
2x=114
Divide both sides by 2,x=`114/2`
x=57
Therefore the unknown number x=57
Please express your views of this topic What is a Composite Number? by commenting on blog.
Practice Problem to Find the Sum of Twice a Number and Seven:
1)The sum of twice a number and seven is 13.Find the number ?
Answer:3
2)The sum of twice a number and seven is 25.Find the number ?
Answer:9
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