3x+30=4x+40

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Solution for 3x+30=4x+40 equation: 



3x+30=4x+40

We move all terms to the left:

3x+30-(4x+40)=0

We get rid of parentheses

3x-4x-40+30=0

We add all the numbers together, and all the variables

-1x-10=0

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

-x=10

x=10/-1

x=-10

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