7. airline fares for a flight from dallas to austin are $30 for first class and $25 for tourist class. if a
flight had 52 passengers who paid $1360, how many first class and tourist class passengers were
there?

i dont know i just need points

f

step-by-step explanation:

f

1) is right

step-by-step explanation:

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