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tigry1 [53]
4 years ago
14

Solve the proportion for the variable given.

Mathematics
1 answer:
xxMikexx [17]4 years ago
7 0

Answer:

A) -50

Step-by-step explanation:

The given proportion relation is

\frac{r + 10}{4}  =  \frac{r}{5}

The least common denominator is 20

We multiply through by 20 to get

20 \times ( \frac{r + 10}{4}) =  \frac{r}{5} \times 20

We simplify to get;

5(r + 10) = 4r

Expand the parenthesis to get:

5r + 50 = 4r

5r - 4r =  - 50

This simplifies to

r =  - 50

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