7x-12x=-20

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Solution for 7x-12x=-20 equation: 



7x-12x=-20

We move all terms to the left:

7x-12x-(-20)=0

We add all the numbers together, and all the variables

-5x+20=0

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

-5x=-20

x=-20/-5

x=+4

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