6x+6x+21=18

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Solution for 6x+6x+21=18 equation: 



6x+6x+21=18

We move all terms to the left:

6x+6x+21-(18)=0

We add all the numbers together, and all the variables

12x+3=0

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

12x=-3

x=-3/12

x=-1/4

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