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3x-4x+21=15 what is the answer to this question ? and how do I get my answer?
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3x-4x+21=15 what is the answer to this question ? and how do I get my answer?

User Sachin Sukumaran
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2 Answers

5 votes
3x-4x+21=15
\/
-1x+21=15
-21 -21
_______
-1x=-6
__. __
-1. -1
x=6
User Larue
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6.2k points
4 votes
3x - 4x + 21= 15; -1x + 21 - 21= 15 - 21; -1x ÷ -1 = -6 ÷ -1; x = 6.
The answer is x = 6.
User Lucas Basquerotto
by
5.5k points
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