400=40(x)+240

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Solution for 400=40(x)+240 equation: 



400=40(x)+240

We move all terms to the left:

400-(40(x)+240)=0

We get rid of parentheses

-40x-240+400=0

We add all the numbers together, and all the variables

-40x+160=0

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

-40x=-160

x=-160/-40

x=+4

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