(D-2)(d-7)=-4

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Solution for (D-2)(d-7)=-4 equation: 



(-2)(D-7)=-4

We move all terms to the left:

(-2)(D-7)-(-4)=0

We add all the numbers together, and all the variables

(-2)(D-7)+4=0

We multiply parentheses ..

(-2D+14)+4=0

We get rid of parentheses

-2D+14+4=0

We add all the numbers together, and all the variables

-2D+18=0

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

-2D=-18

D=-18/-2

D=+9

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