(180-x)-3(90-x)=15

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Solution for (180-x)-3(90-x)=15 equation: 



(180-x)-3(90-x)=15

We move all terms to the left:

(180-x)-3(90-x)-(15)=0

We add all the numbers together, and all the variables

(-1x+180)-3(-1x+90)-15=0

We multiply parentheses

(-1x+180)+3x-270-15=0

We get rid of parentheses

-1x+3x+180-270-15=0

We add all the numbers together, and all the variables

2x-105=0

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

2x=105

x=105/2

x=52+1/2

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