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20+3.5x=30+2.75x
We move all terms to the left:
20+3.5x-(30+2.75x)=0
We add all the numbers together, and all the variables
3.5x-(2.75x+30)+20=0
We get rid of parentheses
3.5x-2.75x-30+20=0
We add all the numbers together, and all the variables
0.75x-10=0
We move all terms containing x to the left, all other terms to the right
0.75x=10
x=10/0.75
x=13+0.25/0.75
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