7-1.5(4-15d)=31

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Solution for 7-1.5(4-15d)=31 equation: 



7-1.5(4-15d)=31

We move all terms to the left:

7-1.5(4-15d)-(31)=0

We add all the numbers together, and all the variables

-1.5(-15d+4)+7-31=0

We add all the numbers together, and all the variables

-1.5(-15d+4)-24=0

We multiply parentheses

22.5d-6-24=0

We add all the numbers together, and all the variables

22.5d-30=0

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

22.5d=30

d=30/22.5

d=1+5/15

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