Solve for d
d=1
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7=7d
Variable d cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by d.
7d=7
Swap sides so that all variable terms are on the left hand side.
d=\frac{7}{7}
Divide both sides by 7.
d=1
Divide 7 by 7 to get 1.
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