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How do you solve for x in 3x-12=9
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2 votes
How do you solve for x in 3x-12=9

User Graham Hannington
by
6.1k points

2 Answers

5 votes

3x - 12=9

3x=9 + 12

3x=21

x=7

User Sam Chen
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6.0k points
7 votes
add 12 to both sides. leaving you with
3x=21
then divide 3 on both sides. leaving you with
x=7

hopefully that’s right!!!
User Tibs
by
6.7k points
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