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2(3-2)-19=2(D+7)+3
We move all terms to the left:
2(3-2)-19-(2(D+7)+3)=0
We add all the numbers together, and all the variables
-(2(D+7)+3)-19+21=0
We add all the numbers together, and all the variables
-(2(D+7)+3)+2=0
We calculate terms in parentheses: -(2(D+7)+3), so:We get rid of parentheses
2(D+7)+3
We multiply parentheses
2D+14+3
We add all the numbers together, and all the variables
2D+17
Back to the equation:
-(2D+17)
-2D-17+2=0
We add all the numbers together, and all the variables
-2D-15=0
We move all terms containing D to the left, all other terms to the right
-2D=15
D=15/-2
D=-7+1/2
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