5x-4=140-7x

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Solution for 5x-4=140-7x equation: 



5x-4=140-7x

We move all terms to the left:

5x-4-(140-7x)=0

We add all the numbers together, and all the variables

5x-(-7x+140)-4=0

We get rid of parentheses

5x+7x-140-4=0

We add all the numbers together, and all the variables

12x-144=0

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

12x=144

x=144/12

x=12

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