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y=42500(.85)^7
We move all terms to the left:
y-(42500(.85)^7)=0
We add all the numbers together, and all the variables
y-(42500(0.85)^7)=0
We add all the numbers together, and all the variables
y-13624.526251953=0
We move all terms containing y to the left, all other terms to the right
y=13624.526251953
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