2 answers:
7 - 4 ( d - 3) = 23
7 - 4d + 12 = 23
Subtract 12 from both sides,
7 - 4d = 11
Subtract 7 to both sides
- 4d = 4
Divide -4 to both sides
d = -1
First, you have to move the {7} over to the other side.
{7-4(d-3)=23}
{-4(d-3)=16}
Next, divide both sides by {-4}.
{-4(d-3)=16}
{d-3=4}
Last, move {-3} to the other side to get the answer.
{d-3=4}
{d=7}
So, <em>d=7. </em>
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