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74d+20d=300+20d
We move all terms to the left:
74d+20d-(300+20d)=0
We add all the numbers together, and all the variables
74d+20d-(20d+300)=0
We add all the numbers together, and all the variables
94d-(20d+300)=0
We get rid of parentheses
94d-20d-300=0
We add all the numbers together, and all the variables
74d-300=0
We move all terms containing d to the left, all other terms to the right
74d=300
d=300/74
d=4+2/37
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