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0.75t+2.5(10-t)=0.87(10)
We move all terms to the left:
0.75t+2.5(10-t)-(0.87(10))=0
We add all the numbers together, and all the variables
0.75t+2.5(-1t+10)-(0.871)=0
We add all the numbers together, and all the variables
0.75t+2.5(-1t+10)-0.871=0
We multiply parentheses
0.75t-2.5t+25-0.871=0
We add all the numbers together, and all the variables
-1.75t+24.129=0
We move all terms containing t to the left, all other terms to the right
-1.75t=-24.129
t=-24.129/-1.75
t=13+1/1.26903553299
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