3x+x+40=2x+20

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Solution for 3x+x+40=2x+20 equation: 



3x+x+40=2x+20

We move all terms to the left:

3x+x+40-(2x+20)=0

We add all the numbers together, and all the variables

4x-(2x+20)+40=0

We get rid of parentheses

4x-2x-20+40=0

We add all the numbers together, and all the variables

2x+20=0

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

2x=-20

x=-20/2

x=-10

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