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I'm thinking of a number. When you triple my number and subtract 8 you get 7. What is my number?
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5 votes
I'm thinking of a number. When you triple my number and subtract 8 you get 7. What is my number?

User FlyingLizard
by
6.8k points

2 Answers

1 vote
3a - 8 = 7
3a (-8 + 8) = (7+8)
3a = 15
(3a/3) = (15/3)
a = 5
The answer is 5
User Taek
by
7.6k points
4 votes
So here, just work backwards:

7+8=15
15/3=5

User Ren P
by
6.3k points
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