20x-(3x+15)=3(4x+5)

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Solution for 20x-(3x+15)=3(4x+5) equation: 



20x-(3x+15)=3(4x+5)

We move all terms to the left:

20x-(3x+15)-(3(4x+5))=0

We get rid of parentheses

20x-3x-(3(4x+5))-15=0



We calculate terms in parentheses: -(3(4x+5)), so:

3(4x+5)

We multiply parentheses

12x+15

Back to the equation:

-(12x+15)



We add all the numbers together, and all the variables

17x-(12x+15)-15=0

We get rid of parentheses

17x-12x-15-15=0

We add all the numbers together, and all the variables

5x-30=0

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

5x=30

x=30/5

x=6

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