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0.5x-2.5=77.5-.3x
We move all terms to the left:
0.5x-2.5-(77.5-.3x)=0
We add all the numbers together, and all the variables
0.5x-(-0.3x+77.5)-2.5=0
We get rid of parentheses
0.5x+0.3x-77.5-2.5=0
We add all the numbers together, and all the variables
0.8x-80=0
We move all terms containing x to the left, all other terms to the right
0.8x=80
x=80/0.8
x=100
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