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30+35x=50+30x
We move all terms to the left:
30+35x-(50+30x)=0
We add all the numbers together, and all the variables
35x-(30x+50)+30=0
We get rid of parentheses
35x-30x-50+30=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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