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# Make r the subject of the formula $$\frac{x}{a+r} =\frac{a}{r}$$

### Question

Make r the subject of the formula $$\frac{x}{a+r} =\frac{a}{r}$$

### Options

A)
$$\frac{a}{a+r}$$
B)
$$\frac{a^{2} }{x-a}$$
C)
$$\frac{a^{2} }{x+a}$$
D)
$$\frac{a }{a-r}$$