X-15=3(x-15)

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Solution for X-15=3(x-15) equation: 



X-15=3(X-15)

We move all terms to the left:

X-15-(3(X-15))=0



We calculate terms in parentheses: -(3(X-15)), so:

3(X-15)

We multiply parentheses

3X-45

Back to the equation:

-(3X-45)



We get rid of parentheses

X-3X+45-15=0

We add all the numbers together, and all the variables

-2X+30=0

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

-2X=-30

X=-30/-2

X=+15

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