Solve {l}{x+4=9}{3x+y-1=125}

$$\left\{ \begin{array} { l } { x + 4 = 9 } \\ { 3 x + y - 1 = 125 } \end{array} \right.$$

Solve for x, y

$$x=5$$

$$y=111$$

Solution Steps

Consider the first equation. Subtract 4 from both sides.

$$x=9-4$$

Subtract 4 from 9 to get 5.

$$x=5$$

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

$$3\times 5+y-1=125$$

Multiply 3 and 5 to get 15.

$$15+y-1=125$$

Subtract 1 from 15 to get 14.

$$14+y=125$$

Subtract 14 from both sides.

$$y=125-14$$

Subtract 14 from 125 to get 111.

$$y=111$$

The system is now solved.

$$x=5 y=111$$