x=40+2(90-x)

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Solution for x=40+2(90-x) equation: 



x=40+2(90-x)

We move all terms to the left:

x-(40+2(90-x))=0

We add all the numbers together, and all the variables

x-(40+2(-1x+90))=0



We calculate terms in parentheses: -(40+2(-1x+90)), so:

40+2(-1x+90)

determiningTheFunctionDomain
2(-1x+90)+40

We multiply parentheses

-2x+180+40

We add all the numbers together, and all the variables

-2x+220

Back to the equation:

-(-2x+220)



We get rid of parentheses

x+2x-220=0

We add all the numbers together, and all the variables

3x-220=0

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

3x=220

x=220/3

x=73+1/3

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