9x-12=7x-20

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Solution for 9x-12=7x-20 equation: 



9x-12=7x-20

We move all terms to the left:

9x-12-(7x-20)=0

We get rid of parentheses

9x-7x+20-12=0

We add all the numbers together, and all the variables

2x+8=0

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

2x=-8

x=-8/2

x=-4

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