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High School Mathematics
10.1 Finding The Value of X

Example:
If a number is increased by 6, the result is 15 find the number.
Solution:
Let the number be x
Increasing x by 6 we get, x + 6, the result is 15, that is
x + 6 = 15
Subtract 6 from both sides, we get,
x + 6 - 6 = 15 - 6
x = 9
Therefore, the number is 9.
Directions: Solve the following questions. Also write at least 10 examples of your own.
Q 1: Solve, x + 7 = 15.
7
8
15
22

 Q 2: If a number is increasing by 15, the result is 36, find the number.
23
28
26
21

Q 3: Solve, x - 15 = 21.
15
21
36
6

 Q 4: If a number is decreased by 8, the result is 15 find the number.
27
23
25
21

Q 5: Solve, 15x = 45.
15
3
21
None of these

 Q 6: If twice a number is equal to 28, find the number.
12
6
8
14

Question 7: This question is available to subscribers only!

 Question 8: This question is available to subscribers only!


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