2x-3 = -(4x+9)
2x-3 = -4x-9
2x+4x=3-9
6x=-6
x=-1
Answer:
(7,-3)
Step-by-step explanation:
y = -3
substitute in the first equation
3x - y^2 = 12
3x - (-3)^2 = 12
3x - 9 = 12
3x = 12 + 9
3x = 21
x = 7
coordinates of intersection (7,-3)
each sister gets 21 dollars, so there are three sisters there fore 21*3 equals 63
