Answer:
y=41/3 and x = -14
Explanation:
system of the linear equation :
-3y-4x=15 eq[i]
9y+7x=25 eq[ii]
multiplying eq[i] by -7 and eq[ii] by 4,we get
21y+28x= -105 eq[iii]
36y+28x= 100 eq[iv]
subtracting eq[iii] from eq[iv],we get
15y=205
y=205/15=41/3
and x= -14