7x+20-2x=40

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Solution for 7x+20-2x=40 equation: 



7x+20-2x=40

We move all terms to the left:

7x+20-2x-(40)=0

We add all the numbers together, and all the variables

5x-20=0

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

5x=20

x=20/5

x=4

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