Solve r/2-15/1

$$\frac { r } { 2 } - \frac { 15 } { 1 }$$

Evaluate

$$\frac{r}{2}-15$$

Short Solution Steps

Anything divided by one gives itself.

$$\frac{r}{2}-15$$

To add or subtract expressions, expand them to make their denominators the same. Multiply 15 times \frac{2}{2}.

$$\frac{r}{2}-\frac{15\times 2}{2}$$

Since \frac{r}{2} and \frac{15\times 2}{2} have the same denominator, subtract them by subtracting their numerators.

$$\frac{r-15\times 2}{2}$$

Do the multiplications in r-15\times 2.

$$\frac{r-30}{2}$$

Factor

$$\frac{r-30}{2}$$

Solution Steps

Factor out \frac{1}{2}.

$$\frac{r-30}{2}$$