Question 3 of 10 Anthony, Brian, and Christine ran a marathon. Anthony finished 1 hour after Brian
finished, and it took Brian twice as long to run the marathon as it took Christine. If
c represents Christine's marathon time in hours, which of the following
expressions represents the number of hours it took Anthony to complete the
marathon?

wheres graph

step-by-step explanation:

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