Which two numbers have a gcf of 10 and an lcm of 60?

a) 6 and 10
b) 12 and 10
c) 18 and 16
d) 30 and 20

the answer would be b

fdvs

step-by-step explanation: vsfdvsfvd

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