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45+15+0.75a=50+.85a
We move all terms to the left:
45+15+0.75a-(50+.85a)=0
We add all the numbers together, and all the variables
0.75a-(.85a+50)+45+15=0
We add all the numbers together, and all the variables
0.75a-(.85a+50)+60=0
We get rid of parentheses
0.75a-.85a-50+60=0
We add all the numbers together, and all the variables
-0.1a+10=0
We move all terms containing a to the left, all other terms to the right
-0.1a=-10
a=-10/-0.1
a=+100
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