120=75d+90d

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Solution for 120=75d+90d equation: 



120=75d+90d

We move all terms to the left:

120-(75d+90d)=0

We add all the numbers together, and all the variables

-(+165d)+120=0

We get rid of parentheses

-165d+120=0

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

-165d=-120

d=-120/-165

d=8/11

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