Question

9a + 15 = 10a - 7
Solve please

Answer 1

subtract 9a from both sides
9a - 9a + 15 = 10a - 9a + 7
15 = a - 7
add 7 to both sides
15 + 7 = a - 7 + 7
a = 22

Answer 2

Answer: a = 22

Explanation:

9a + 15 = 10a - 7

Step 1: combine like terms

9a - 10a= -7 -15

-1a = -22

a = 22