A DRESS WHICH COST $180 is being sold at a discount of 10%. The amount of the discount is
A) $1.80
B)$10.00
C)$18.00
D)$170.00

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

6/20

step-by-step explanation:

answer: 193

explanation:

200-7 = 193