Solve for d
d=64
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d=56\times \frac{8}{7}
Multiply both sides by \frac{8}{7}, the reciprocal of \frac{7}{8}.
d=\frac{56\times 8}{7}
Express 56\times \frac{8}{7} as a single fraction.
d=\frac{448}{7}
Multiply 56 and 8 to get 448.
d=64
Divide 448 by 7 to get 64.
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