Please help with this

#2

Step-by-step explanation:

The set value will be 5. If x is 0, y will be 5 since the equation states y = 5 + 2x. If x = 1, y will equal 3 since 5 - 2 is 3 (2 times 1 since x is 1). If x equals 2, y will equal 1 because 2(2) is 4 and 5 - 4 is 1. All the x values are true which is why the answer is #2

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

the answer is 40.

proof: