Astudent claims that the equation y = 7 is not a linear equation because it does not have the form y = mx + b. do you agree or disagree? why? complete the explanation. the be written in the form y = mx + b, and the graph of the solution is . so, i

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 one below it is a function