21=0.5(4x+6)

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Solution for 21=0.5(4x+6) equation: 



21=0.5(4x+6)

We move all terms to the left:

21-(0.5(4x+6))=0



We calculate terms in parentheses: -(0.5(4x+6)), so:

0.5(4x+6)

We multiply parentheses

2x+3

Back to the equation:

-(2x+3)



We get rid of parentheses

-2x-3+21=0

We add all the numbers together, and all the variables

-2x+18=0

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

-2x=-18

x=-18/-2

x=+9

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