Jawab pake jalan ya makasih

113) 4x+y = 7 (dikali 4)
3x-4y = 10 (dikali 1)

menjadi 16x + 4y = 28
3x - 4y = 10
___________ +
19x =38
x = 2 (a)
4x+y = 7
4.2+y =7
8+y=7
y=7-8
y = -1 (b)

*5a-2b = 5.2 -2.-1= 10+ 2= 12*