Solve {l}{x=y+1}{x=5}{z=y}{text{Solvefor}atext{where}}{a=z}

$$\left. \begin{array} { l } { x = y + 1 }\\ { x = 5 }\\ { z = y }\\ { \text{Solve for } a \text{ where} } \\ { a = z } \end{array} \right.$$

Solve for x, y, z, a

$$a=4$$

Solution Steps

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

$$5=y+1$$

Swap sides so that all variable terms are on the left hand side.

$$y+1=5$$

Subtract 1 from both sides.

$$y=5-1$$

Subtract 1 from 5 to get 4.

$$y=4$$

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

$$z=4$$

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

$$a=4$$

The system is now solved.

$$x=5 y=4 z=4 a=4$$