The lengths of the legs of a 45° -45° -90° triangle can be described by the expressions 3x - 10 and x + 2. What is the length of the legs of the triangle?

for the points! : )

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

answer:   y=2x-3

step-by-step explanation:

i believe b is the answer