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2+4d-(d-2)=2(7-d)
We simplify the equation to the form, which is simple to understand
2+4d-(d-2)=2(7-d)
Remove unnecessary parentheses
2+4d-1d+2=2*(7-d)
Reorder the terms in parentheses
2+4d-1d+2=+(+14-2d)
Remove unnecessary parentheses
+2+4d-1d+2=+14-2d
We move all terms containing d to the left and all other terms to the right.
+4d-1d+2d=+14-2-2
We simplify left and right side of the equation.
+5d=+10
We divide both sides of the equation by 5 to get d.
d=2
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