11x-7x+12=2x+3-21

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Solution for 11x-7x+12=2x+3-21 equation: 



11x-7x+12=2x+3-21

We move all terms to the left:

11x-7x+12-(2x+3-21)=0

We add all the numbers together, and all the variables

11x-7x-(2x-18)+12=0

We add all the numbers together, and all the variables

4x-(2x-18)+12=0

We get rid of parentheses

4x-2x+18+12=0

We add all the numbers together, and all the variables

2x+30=0

We move all terms containing x to the left, all other terms to the right

2x=-30

x=-30/2

x=-15

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