3.x=40+5.x

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Solution for 3.x=40+5.x equation: 



3.x=40+5.x

We move all terms to the left:

3.x-(40+5.x)=0

We add all the numbers together, and all the variables

3.x-(5.x+40)=0

We get rid of parentheses

3.x-5.x-40=0

We add all the numbers together, and all the variables

-2x-40=0

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

-2x=40

x=40/-2

x=-20

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