40-2x=70-4x

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Solution for 40-2x=70-4x equation: 



40-2x=70-4x

We move all terms to the left:

40-2x-(70-4x)=0

We add all the numbers together, and all the variables

-2x-(-4x+70)+40=0

We get rid of parentheses

-2x+4x-70+40=0

We add all the numbers together, and all the variables

2x-30=0

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

2x=30

x=30/2

x=15

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