3x+50=12x-40

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Solution for 3x+50=12x-40 equation: 



3x+50=12x-40

We move all terms to the left:

3x+50-(12x-40)=0

We get rid of parentheses

3x-12x+40+50=0

We add all the numbers together, and all the variables

-9x+90=0

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

-9x=-90

x=-90/-9

x=+10

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