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5 votes
9a + 15 = 10a - 7
Solve please

2 Answers

1 vote
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
User Ycr
by
7.3k points
3 votes

Answer: a = 22

Explanation:

9a + 15 = 10a - 7

Step 1: combine like terms

9a - 10a= -7 -15

-1a = -22

a = 22

User Irineu Antunes
by
6.8k points