7.5d+60=90

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Solution for 7.5d+60=90 equation: 



7.5d+60=90

We move all terms to the left:

7.5d+60-(90)=0

We add all the numbers together, and all the variables

7.5d-30=0

We move all terms containing d to the left, all other terms to the right

7.5d=30

d=30/7.5

d=4

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