12x-140=5x-7

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Solution for 12x-140=5x-7 equation: 



12x-140=5x-7

We move all terms to the left:

12x-140-(5x-7)=0

We get rid of parentheses

12x-5x+7-140=0

We add all the numbers together, and all the variables

7x-133=0

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

7x=133

x=133/7

x=19

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