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86.5=2t+86.5(2t-40.75)
We move all terms to the left:
86.5-(2t+86.5(2t-40.75))=0
We calculate terms in parentheses: -(2t+86.5(2t-40.75)), so:We get rid of parentheses
2t+86.5(2t-40.75)
We multiply parentheses
2t+173t-3524.875
We add all the numbers together, and all the variables
175t-3524.875
Back to the equation:
-(175t-3524.875)
-175t+3524.875+86.5=0
We add all the numbers together, and all the variables
-175t+3611.375=0
We move all terms containing t to the left, all other terms to the right
-175t=-3611.375
t=-3611.375/-175
t=20+81/127.27272727273
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