Solve x-30%=21

$$x-30 \% =21$$

Solve for x

$$x = \frac{213}{10} = 21\frac{3}{10} = 21.3$$

Steps for Solving Linear Equation

Reduce the fraction \frac{30}{100} to lowest terms by extracting and canceling out 10.

$$x-\frac{3}{10}=21$$

Add \frac{3}{10} to both sides.

$$x=21+\frac{3}{10}$$

Convert 21 to fraction \frac{210}{10}.

$$x=\frac{210}{10}+\frac{3}{10}$$

Since \frac{210}{10} and \frac{3}{10} have the same denominator, add them by adding their numerators.

$$x=\frac{210+3}{10}$$

Add 210 and 3 to get 213.

$$x=\frac{213}{10}$$