What is (-m)-3n if m = 2 and n = -24?

70

Step-by-step explanation:

Knowing both values of variables m and n, you could substitute each of the values inside the equation.

=(-(2))-3(-24)

=(-2)+72

=70

Hope it helped! (:

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