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(145-x)*0.8+x=116
We move all terms to the left:
(145-x)*0.8+x-(116)=0
We add all the numbers together, and all the variables
(-1x+145)*0.8+x-116=0
We add all the numbers together, and all the variables
x+(-1x+145)*0.8-116=0
We multiply parentheses
x-0.8x+116-116=0
We add all the numbers together, and all the variables
0.2x=0
x=0/0.2
x=0
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