140-3.5x=125-3x

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Solution for 140-3.5x=125-3x equation: 



140-3.5x=125-3x

We move all terms to the left:

140-3.5x-(125-3x)=0

We add all the numbers together, and all the variables

-3.5x-(-3x+125)+140=0

We get rid of parentheses

-3.5x+3x-125+140=0

We add all the numbers together, and all the variables

-0.5x+15=0

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

-0.5x=-15

x=-15/-0.5

x=+30

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