Chris can be paid in one of two ways. plan a is a salary of $350 per month, plus a commission of 7% of a sales. plan b is a salary of $436 per month, plus a commission of 5% of sales. for what amount of sales is chris better off selecting plan a

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

(23*2)-12=x     x=34

step-by-step explanation: