8x=400-2x

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Solution for 8x=400-2x equation: 



8x=400-2x

We move all terms to the left:

8x-(400-2x)=0

We add all the numbers together, and all the variables

8x-(-2x+400)=0

We get rid of parentheses

8x+2x-400=0

We add all the numbers together, and all the variables

10x-400=0

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

10x=400

x=400/10

x=40

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