12x 6x + y = 1Please explain how you got your answer,thanks! :)

12x - 3y = -3

6x +   y  =
1

First multiply everything in the second equation by
3

By multiplying, you should
get

12x - 3y =
-3

18x + 3y = 3 
now add -3y with 3y ( which means also add 12x with 18x and -3 with 3 )

By adding, you should
get

30x = 0 divide both sides
by 30

By dividing you should
get

x = 0/30
simplify

x = 0
which is your answer for " x "

Now plug 0
into one of the equation

6 ( 0 ) +   y  =
1 Multiply 6 with 0

By multiplying you
should get

y = 1 which is your
answer for " y "

So your answer is x = 0  ; y
= 1