Question

WILL GIVE BRAINLIESTTT!!!!!!!!!

Answer 1

Answer:

x-y=12 or x=12+y??????

Step-by-step explanation:

6x+y=30

-2x-5y=18

Add the equations up: 4x-4y=48

Divide by 4

x-4y=12

Divide by 4 again

x-y=12

+y on both sides

x=12+y

(I might be wrong)

Answer 2

Answer:

$x=6; y=-6$

Step-by-step explanation:

Unless you're required to use any particular method, let's add the first to twice the second to eliminate x:

$6x+y-6x-15y=30+54 \rightarrow -14y=54 \rightarrow y=-6$

At this point let's plug this value of y in the first equation and find x:

$6x+(-6)=30 \rightarrow x-1=5 \rightarrow x=6$