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0.75t+0.25(10-t)=0.87(10)
We move all terms to the left:
0.75t+0.25(10-t)-(0.87(10))=0
We add all the numbers together, and all the variables
0.75t+0.25(-1t+10)-(0.871)=0
We add all the numbers together, and all the variables
0.75t+0.25(-1t+10)-0.871=0
We multiply parentheses
0.75t-0.25t+2.5-0.871=0
We add all the numbers together, and all the variables
0.5t+1.629=0
We move all terms containing t to the left, all other terms to the right
0.5t=-1.629
t=-1.629/0.5
t=-3+0.129/0.5
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