Solve 81x/4-81

$$\frac { 81 x } { 4 } - 81$$

Evaluate

$$\frac{81\left(x-4\right)}{4}$$

Short Solution Steps

To add or subtract expressions, expand them to make their denominators the same. Multiply 81 times \frac{4}{4}.

$$\frac{81x}{4}-\frac{81\times 4}{4}$$

Since \frac{81x}{4} and \frac{81\times 4}{4} have the same denominator, subtract them by subtracting their numerators.

$$\frac{81x-81\times 4}{4}$$

Do the multiplications in 81x-81\times 4.

$$\frac{81x-324}{4}$$

Factor

$$\frac{81\left(x-4\right)}{4}$$

Solution Steps

Factor out \frac{81}{4}.

$$\frac{81\left(x-4\right)}{4}$$