What is the solution to the following system?

The correct answer is option 3. (20, 4, 5)

Step-by-step explanation:

To solve this problem we use the substitution method.

(i)

(ii)

(iii)  

We start by clearing x in (iii) and clearing y in (ii).

(iii)

(ii)

Now we substitute (iii) in (ii)

(iv)

Now we substitute (iii) and (iv) into (i) and clear z.

(v)

If (v)

We substitute (v) in (iii) and then substitute (v) in (iv)

The correct answer is option 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