x=0.5(90-x)

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Solution for x=0.5(90-x) equation: 



x=0.5(90-x)

We move all terms to the left:

x-(0.5(90-x))=0

We add all the numbers together, and all the variables

x-(0.5(-1x+90))=0



We calculate terms in parentheses: -(0.5(-1x+90)), so:

0.5(-1x+90)

We multiply parentheses

-0.5x+45

Back to the equation:

-(-0.5x+45)



We get rid of parentheses

x+0.5x-45=0

We add all the numbers together, and all the variables

1.5x-45=0

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

1.5x=45

x=45/1.5

x=30

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