Solve {l}{x-y=2}{y=0}{z=85x}{text{Solvefor}atext{where}}{a=z}

$$\left. \begin{array} { l } { x - y = 2 }\\ { y = 0 }\\ { z = 85 x }\\ { \text{Solve for } a \text{ where} } \\ { a = z } \end{array} \right.$$

Solve for x, y, z, a

$$a=170$$

Solution Steps

Consider the first equation. Insert the known values of variables into the equation.

$$x-0=2$$

Multiply -1 and 0 to get 0.

$$x+0=2$$

Anything plus zero gives itself.

$$x=2$$

Consider the third equation. Insert the known values of variables into the equation.

$$z=85\times 2$$

Multiply 85 and 2 to get 170.

$$z=170$$

Consider the fourth equation. Insert the known values of variables into the equation.

$$a=170$$

The system is now solved.

$$x=2 y=0 z=170 a=170$$