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130+30x=80+0.80x
We move all terms to the left:
130+30x-(80+0.80x)=0
We add all the numbers together, and all the variables
30x-(0.80x+80)+130=0
We get rid of parentheses
30x-0.80x-80+130=0
We add all the numbers together, and all the variables
29.2x+50=0
We move all terms containing x to the left, all other terms to the right
29.2x=-50
x=-50/29.2
x=-1+11.555555555556/16.222222222222
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