Aright triangle abc is shown below:

a right triangle abc with height ab labeled 4 units and base bc labeled 5 units is shown.

the area of the triangle above will equal one half of a rectangle that is 5 units long and __ units wide. (input only whole numbers, such as 8.)

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