87=9d+15

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Solution for 87=9d+15 equation:



87=9d+15
We move all terms to the left:
87-(9d+15)=0
We get rid of parentheses
-9d-15+87=0
We add all the numbers together, and all the variables
-9d+72=0
We move all terms containing d to the left, all other terms to the right
-9d=-72
d=-72/-9
d=+8

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