12x+20-15x=5x-100

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Solution for 12x+20-15x=5x-100 equation: 



12x+20-15x=5x-100

We move all terms to the left:

12x+20-15x-(5x-100)=0

We add all the numbers together, and all the variables

-3x-(5x-100)+20=0

We get rid of parentheses

-3x-5x+100+20=0

We add all the numbers together, and all the variables

-8x+120=0

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

-8x=-120

x=-120/-8

x=+15

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