The given equation is,

Thus, option (C) is the correct solution.
Answer:
x=2
y=4
3 times 4 equals 12 and 2 plus 4 would equal six
Y = -x + 4.....so sub in -x + 4 in for y in the other equation
x + 2y = -8
x + 2(-x + 4) = -8
x - 2x + 8 = -8
x - 2x = -8 - 8
-x = -16
x = 16
y = -x + 4
y = -16 + 4
y = - 12
one solution (16,-12)
Create and solve an appropriate equation: Maria's earnings = Liam's earnings
0.20x = $625+0.10x.
Find x.
0.10x = $625; thus, x = $6250. At this level of food sales, these two people earn the same amount.