# How do you solve #9/4=(r-10)/r#?

Start by multiplying by a cross.

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To solve the equation ( \frac{9}{4} = \frac{r-10}{r} ), you can cross multiply to eliminate the fractions. Multiply (9) by (r) and (4) by (r-10). This gives you (9r = 4(r-10)). Then, distribute the (4) on the right side, giving you (9r = 4r - 40). Subtract (4r) from both sides to isolate (r), resulting in (5r = -40). Finally, divide both sides by (5) to find (r), which equals (-8).

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