Johnchard98viz
Answered

Solve the following systems by substitution: x + 3y = -4
y = -x

Sagot :

Mlcparra16viz
x + 3y = -4
Since y=-x we substitute this to the first equation

x -3x = -4
 -2x = -4
    x = 2

Since y = -x , y = - 2