18x+6y=108
6x+10y=108

x = 3

y = 9

Step-by-step explanation:

18x+6y=108   (I)

6x+10y=108   (II)

(I)                  18x + 6y = 108

(II)*(-3)         -18x  - 30y = -324   {Now add, x will be eliminated}

                          - 24y  = -216

                                y = -216/-24

                              y = 9

Substitute y = 9 in equation (I)

18x + 6*9 = 108

18x + 54 = 108

        18x = 108 - 54

        18x = 54

           x = 54/18

x = 3

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9