Answer:
x = -1
y = -8
Step-by-step explanation:
to evaluate this system of equation using the substitution methods, we would say that let
8x+y=-16.................................................. equation 1
-3x+y=-5................................................... equation 2
from equation 2
-3x+y=-5................................................... equation 2
y = -5 + 3x ................................................. equation 3
substitute for y into equation 1
8x+y=-16.................................................. equation 1
8x + ( -5 + 3x) = -16
8x - 5 + 3x = -16
collect the like terms
8x + 3x = -16 + 5
11x = -11
divide both sides by the coefficient of x
11x/11 = -11/11
x = -1
put the value of x = -1 into equation 3
y = -5 + 3x ................................................. equation 3
y = -5 + 3(-1)
y = -5 - 3
y = -8
