Question 667091
first number =x
second number = y
3x-y=-29...................(1)
x+4y=12 ....................(2)

multiply equation (1) by 4
we get 12x-4y=-116

add this to (2)
13x=-104
/13
x= -8

plug x in (1)
3x-y =-29
3(-8)-y=-29
-24-y=-29
-y=-29+24
-y=-5
y=5

The numbers are -8 & 5