During the month of february, hal’s weekly grocery bills were $109.60, $114.56, $85.90, and $122.14. find his average weekly grocery bill in february to the nearest dollar

In what i got the answer has to be $108

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

can you complete your sentence? i could !