3x-15=3(5-x)

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Solution for 3x-15=3(5-x) equation: 



3x-15=3(5-x)

We move all terms to the left:

3x-15-(3(5-x))=0

We add all the numbers together, and all the variables

3x-(3(-1x+5))-15=0



We calculate terms in parentheses: -(3(-1x+5)), so:

3(-1x+5)

We multiply parentheses

-3x+15

Back to the equation:

-(-3x+15)



We get rid of parentheses

3x+3x-15-15=0

We add all the numbers together, and all the variables

6x-30=0

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

6x=30

x=30/6

x=5

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