If (x + 2)/2 = y/5, then which of the following must be true?
x/2 = (y-2)/5
x/2 = (4-5)/5
(x+2)/5 = 1125

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

20 feet per second

hope i

-lavira : )