Question

The sum of a number and seven more than the number is 43. What is the number?

Answer 1

18

Explanation:

• we can use the variable x to represent the number since it's currently unknown

• seven more than the number can be represented as x + 7
• we can find the sum of both by adding them

x + x + 7 = 43

2x + 7 = 43

-7 -7

2x = 36

• we divide by 2 on both sides to isolate x

x = 18