9x-13-7x+21=-4

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Solution for 9x-13-7x+21=-4 equation: 



9x-13-7x+21=-4

We move all terms to the left:

9x-13-7x+21-(-4)=0

We add all the numbers together, and all the variables

2x+12=0

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

2x=-12

x=-12/2

x=-6

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