(180-x)-30=5(90-x)

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Solution for (180-x)-30=5(90-x) equation: 



(180-x)-30=5(90-x)

We move all terms to the left:

(180-x)-30-(5(90-x))=0

We add all the numbers together, and all the variables

(-1x+180)-(5(-1x+90))-30=0

We get rid of parentheses

-1x-(5(-1x+90))+180-30=0



We calculate terms in parentheses: -(5(-1x+90)), so:

5(-1x+90)

We multiply parentheses

-5x+450

Back to the equation:

-(-5x+450)



We add all the numbers together, and all the variables

-1x-(-5x+450)+150=0

We get rid of parentheses

-1x+5x-450+150=0

We add all the numbers together, and all the variables

4x-300=0

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

4x=300

x=300/4

x=75

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