Solve {l}{8+7=x}{x=y}{z=y}{a=z}{b=a}{c=b}{text{Solvefor}dtext{where}}{d=c}

$$\left. \begin{array} { l } { 8 + 7 = x }\\ { x = y }\\ { z = y }\\ { a = z }\\ { b = a }\\ { c = b }\\ { \text{Solve for } d \text{ where} } \\ { d = c } \end{array} \right.$$

Solve for x, y, z, a, b, c, d

$$d=15$$

Solution Steps

Consider the first equation. Add 8 and 7 to get 15.

$$15=x$$

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

$$x=15$$

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

$$15=y$$

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

$$y=15$$

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

$$z=15$$

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

$$a=15$$

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

$$b=15$$

Consider the equation (6). Insert the known values of variables into the equation.

$$c=15$$

Consider the equation (7). Insert the known values of variables into the equation.

$$d=15$$

The system is now solved.

$$x=15 y=15 z=15 a=15 b=15 c=15 d=15$$