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2x+20+2x+20=4x+30
We move all terms to the left:
2x+20+2x+20-(4x+30)=0
We add all the numbers together, and all the variables
4x-(4x+30)+40=0
We get rid of parentheses
4x-4x-30+40=0
We add all the numbers together, and all the variables
10!=0
There is no solution for this equation
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