120-3x=140-5x

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Solution for 120-3x=140-5x equation: 



120-3x=140-5x

We move all terms to the left:

120-3x-(140-5x)=0

We add all the numbers together, and all the variables

-3x-(-5x+140)+120=0

We get rid of parentheses

-3x+5x-140+120=0

We add all the numbers together, and all the variables

2x-20=0

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

2x=20

x=20/2

x=10

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