(15-x)+(-3x)+45=180

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Solution for (15-x)+(-3x)+45=180 equation: 



(15-x)+(-3x)+45=180

We move all terms to the left:

(15-x)+(-3x)+45-(180)=0

We add all the numbers together, and all the variables

(-1x+15)+(-3x)+45-180=0

We add all the numbers together, and all the variables

(-1x+15)+(-3x)-135=0

We get rid of parentheses

-1x-3x+15-135=0

We add all the numbers together, and all the variables

-4x-120=0

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

-4x=120

x=120/-4

x=-30

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