Question

Explain how to solve the equation

b-7=12

Answer 1

Sample Response

Explanation:

Use the inverse operation to isolate the variable. Undo the subtraction of 7 by adding 7 to each side of the equation. – 7 + 7 = 0, and 12 + 7 is 19. The solution is b = 19. Check the solution by substituting 19 for b in the original equation, and then simplify. 19 – 7 is 12 and 12 = 12 is a true statement, so 19 is the solution.

Answer 2

`b = 19`

Explanation:

1) Add 7 to both sides.

`b = 12 + 7`

2) Simplify 12 + 7 to 19.

`b = 19`

Therefor the answer is, b = 19.