Answer:
(7, -1)
Step-by-step explanation:
4x + 8y = 20 equation 1
-4x + 2y = -30 equation 2
using equation 2 we have:
2y = -30 +4x
y = (-30 +4x)/2
y = -15 +2x equation 3
using equation 3 in equation 1 we have:
4x + 8(-15+2x) = 20
4x - 120 + 16x = 20
20x - 120 = 20
20x = 20+120
20x = 140
x = 140/20
x =7
and we have:
y = -15 +2(7)
y = -15+14
y = -1
