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.05(-d+30)+.1d=2.40
We move all terms to the left:
.05(-d+30)+.1d-(2.40)=0
We add all the numbers together, and all the variables
.05(-1d+30)+.1d-(2.4)=0
We add all the numbers together, and all the variables
.1d+.05(-1d+30)-2.4=0
We multiply parentheses
.1d-0.05d+1.5-2.4=0
We add all the numbers together, and all the variables
0.05d-0.9=0
We move all terms containing d to the left, all other terms to the right
0.05d=0.9
d=0.9/0.05
d=18
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