If 5log22x = 20, what is the value of x?

16

8 (correct)

5

4

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

add a pic of the graph, then ill edit this "answer" and solve it for you : 3

step-by-step explanation:

2 over 5 and 4 over 15

don’t know last one sorry

step-by-step explanation: