9+3x=-4x-12

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Solution for 9+3x=-4x-12 equation:



9+3x=-4x-12
We move all terms to the left:
9+3x-(-4x-12)=0
We get rid of parentheses
3x+4x+12+9=0
We add all the numbers together, and all the variables
7x+21=0
We move all terms containing x to the left, all other terms to the right
7x=-21
x=-21/7
x=-3

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