Solve 2x/5*3/4=21

$$\frac { 2 x } { 5 } \cdot \frac { 3 } { 4 } = 21$$

Solve for x

$$x=70$$

Steps for Solving Linear Equation

Multiply both sides by \frac{4}{3}, the reciprocal of \frac{3}{4}.

$$\frac{2x}{5}=21\times \frac{4}{3}$$

Express 21\times \frac{4}{3} as a single fraction.

$$\frac{2x}{5}=\frac{21\times 4}{3}$$

Multiply 21 and 4 to get 84.

$$\frac{2x}{5}=\frac{84}{3}$$

Divide 84 by 3 to get 28.

$$\frac{2x}{5}=28$$

Multiply both sides by 5.

$$2x=28\times 5$$

Multiply 28 and 5 to get 140.

$$2x=140$$

Divide both sides by 2.

$$x=\frac{140}{2}$$

Divide 140 by 2 to get 70.

$$x=70$$