Which expression correctly represents "eight times the difference of four and a number"? O 8n-(4)
O 8(4-1)
O S(n)-4
OB(4)-n

Help

should be something close to 8 * (4-n) or 8 * (n-4)

Step-by-step explanation:

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

what do u need to know

step-by-step explanation: