3x+21=-2x-4=-5x

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Solution for 3x+21=-2x-4=-5x equation:



3x+21=-2x-4=-5x
We move all terms to the left:
3x+21-(-2x-4)=0
We get rid of parentheses
3x+2x+4+21=0
We add all the numbers together, and all the variables
5x+25=0
We move all terms containing x to the left, all other terms to the right
5x=-25
x=-25/5
x=-5

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