-4=-3(d+7)+-7

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Solution for -4=-3(d+7)+-7 equation: 



-4=-3(d+7)+-7

We move all terms to the left:

-4-(-3(d+7)+-7)=0

We use the square of the difference formula

-(-3(d+7)-7)-4=0



We calculate terms in parentheses: -(-3(d+7)-7), so:

-3(d+7)-7

We multiply parentheses

-3d-21-7

We add all the numbers together, and all the variables

-3d-28

Back to the equation:

-(-3d-28)



We get rid of parentheses

3d+28-4=0

We add all the numbers together, and all the variables

3d+24=0

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

3d=-24

d=-24/3

d=-8

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