-15(20+d)=-420

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Solution for -15(20+d)=-420 equation: 



-15(20+d)=-420

We move all terms to the left:

-15(20+d)-(-420)=0

We add all the numbers together, and all the variables

-15(d+20)-(-420)=0

We add all the numbers together, and all the variables

-15(d+20)+420=0

We multiply parentheses

-15d-300+420=0

We add all the numbers together, and all the variables

-15d+120=0

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

-15d=-120

d=-120/-15

d=+8

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