(2x+2x)+(4x+4x)=40

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Solution for (2x+2x)+(4x+4x)=40 equation: 



(2x+2x)+(4x+4x)=40

We move all terms to the left:

(2x+2x)+(4x+4x)-(40)=0

We add all the numbers together, and all the variables

(+4x)+(+8x)-40=0

We get rid of parentheses

4x+8x-40=0

We add all the numbers together, and all the variables

12x-40=0

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

12x=40

x=40/12

x=3+1/3

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