Question

Solve the system of equations using the substitution method.

Answer 1

4x+5(3x+9)=7
4x+15x+45=7
19x=7-45
19x = -38
$\frac{19x}{19} = \frac{ - 38}{19}$
x= -2

y=3(-2)+9
y=-6+9
y= 3