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225t-4=6.4
We move all terms to the left:
225t-4-(6.4)=0
We add all the numbers together, and all the variables
225t-10.4=0
We move all terms containing t to the left, all other terms to the right
225t=10.4
t=10.4/225
t=1.9259259259259/41.666666666667
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