3(90-x)=(180-x)+40

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Solution for 3(90-x)=(180-x)+40 equation: 



3(90-x)=(180-x)+40

We move all terms to the left:

3(90-x)-((180-x)+40)=0

We add all the numbers together, and all the variables

3(-1x+90)-((-1x+180)+40)=0

We multiply parentheses

-3x-((-1x+180)+40)+270=0



We calculate terms in parentheses: -((-1x+180)+40), so:

(-1x+180)+40

We get rid of parentheses

-1x+180+40

We add all the numbers together, and all the variables

-1x+220

Back to the equation:

-(-1x+220)



We get rid of parentheses

-3x+1x-220+270=0

We add all the numbers together, and all the variables

-2x+50=0

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

-2x=-50

x=-50/-2

x=+25

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