4x=5(45-x)

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Solution for 4x=5(45-x) equation: 



4x=5(45-x)

We move all terms to the left:

4x-(5(45-x))=0

We add all the numbers together, and all the variables

4x-(5(-1x+45))=0



We calculate terms in parentheses: -(5(-1x+45)), so:

5(-1x+45)

We multiply parentheses

-5x+225

Back to the equation:

-(-5x+225)



We get rid of parentheses

4x+5x-225=0

We add all the numbers together, and all the variables

9x-225=0

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

9x=225

x=225/9

x=25

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