3x+5x-12=3(2x+4)

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Solution for 3x+5x-12=3(2x+4) equation: 



3x+5x-12=3(2x+4)

We move all terms to the left:

3x+5x-12-(3(2x+4))=0

We add all the numbers together, and all the variables

8x-(3(2x+4))-12=0



We calculate terms in parentheses: -(3(2x+4)), so:

3(2x+4)

We multiply parentheses

6x+12

Back to the equation:

-(6x+12)



We get rid of parentheses

8x-6x-12-12=0

We add all the numbers together, and all the variables

2x-24=0

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

2x=24

x=24/2

x=12

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