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50+20+0.45x=50+0.55x
We move all terms to the left:
50+20+0.45x-(50+0.55x)=0
We add all the numbers together, and all the variables
0.45x-(0.55x+50)+50+20=0
We add all the numbers together, and all the variables
0.45x-(0.55x+50)+70=0
We get rid of parentheses
0.45x-0.55x-50+70=0
We add all the numbers together, and all the variables
-0.1x+20=0
We move all terms containing x to the left, all other terms to the right
-0.1x=-20
x=-20/-0.1
x=+200
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