3x+20+x=18-

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Solution for 3x+20+x=18- equation: 



3x+20+x=18-

We move all terms to the left:

3x+20+x-(18-)=0

We add all the numbers together, and all the variables

3x+x+20-0=0

We add all the numbers together, and all the variables

4x+20=0

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

4x=-20

x=-20/4

x=-5

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