15(100+5d)+20(50+7d)=8950

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Solution for 15(100+5d)+20(50+7d)=8950 equation: 



15(100+5d)+20(50+7d)=8950

We move all terms to the left:

15(100+5d)+20(50+7d)-(8950)=0

We add all the numbers together, and all the variables

15(5d+100)+20(7d+50)-8950=0

We multiply parentheses

75d+140d+1500+1000-8950=0

We add all the numbers together, and all the variables

215d-6450=0

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

215d=6450

d=6450/215

d=30

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