12x+21=2(4x+6)

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Solution for 12x+21=2(4x+6) equation: 



12x+21=2(4x+6)

We move all terms to the left:

12x+21-(2(4x+6))=0



We calculate terms in parentheses: -(2(4x+6)), so:

2(4x+6)

We multiply parentheses

8x+12

Back to the equation:

-(8x+12)



We get rid of parentheses

12x-8x-12+21=0

We add all the numbers together, and all the variables

4x+9=0

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

4x=-9

x=-9/4

x=-2+1/4

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