-3(5-2d)-2d=d-21

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Solution for -3(5-2d)-2d=d-21 equation: 



-3(5-2d)-2d=d-21

We move all terms to the left:

-3(5-2d)-2d-(d-21)=0

We add all the numbers together, and all the variables

-3(-2d+5)-2d-(d-21)=0

We add all the numbers together, and all the variables

-2d-3(-2d+5)-(d-21)=0

We multiply parentheses

-2d+6d-(d-21)-15=0

We get rid of parentheses

-2d+6d-d+21-15=0

We add all the numbers together, and all the variables

3d+6=0

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

3d=-6

d=-6/3

d=-2

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