z = (x + y)/mx; Solve for x

Cross multiply:

zmx = x + y

Subtract x from each side

zmx - x = y

Factor out x

x(zm - 1) = y

Divide each side by zm - 1

x = y/(zm - 1)

Cross multiply:

zmx = x + y

Subtract x from each side

zmx - x = y

Factor out x

x(zm - 1) = y

Divide each side by zm - 1

x = y/(zm - 1)

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