Answer:
8x+6y=48
x+y=7
multiply bottom equation by 6:
8x+6y=48
6x+6y=42
subtract equations:
2x=6
divide 6 by 2:
x=3
therefore:
y=4
It's ten times as great ... just like 10 is ten times as great as 1.
M = 20/-4 = -5
Sub in (-4,0): 20+b = 0 ->b = -20
So, y = -5x - 20
