7x-40=4x+20

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Solution for 7x-40=4x+20 equation: 



7x-40=4x+20

We move all terms to the left:

7x-40-(4x+20)=0

We get rid of parentheses

7x-4x-20-40=0

We add all the numbers together, and all the variables

3x-60=0

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

3x=60

x=60/3

x=20

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