Answer:
x=-3
y=-10
Step-by-step explanation:
X+y=-13 Equation 1
4x+6y=-72 Equation 2
Using substitution method
Make x the subject in equation 1
X=-13-y Equation 3
Substitute for x in equation 2
4x+6y=-72
4(-13-y)+6y=-72
-52-4y+6y=-72
-52+2y=-72
2y=-72+52
2y=-20
y=-20/2
y=-10
Substitute y for -10 in equation 1
X+y=-13
X-10=-13
x=-13+10
x=-3
