Question

Solve the system of equations by graphing.
x+y = -7
4x + y = 19

Answer 1

(8.666666667, -15.66666667)

or in fraction form

(26/3, -47/3)

Explanation:

First we want to get both of the equations into y-intercept form

x + y = -7

subtract x from both sides

y = -x - 7

and the other

4x + y = 19

subtract 4x from both sides

y = -4x +19

now we can graph them

(See attached screenshot)