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12.50+10t(.40)=16.50
We move all terms to the left:
12.50+10t(.40)-(16.50)=0
We add all the numbers together, and all the variables
10t(0.4)+12.50-(16.5)=0
We add all the numbers together, and all the variables
10t(0.4)-4=0
We multiply parentheses
4t-4=0
We move all terms containing t to the left, all other terms to the right
4t=4
t=4/4
t=1
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