Kk tolong di bantu ya no 13 sama 14

14.AB =C
2 x 1 -2 = -1 -8
y 0 3 4 1 -2


2.1+3.x 2(-2)+x.4 = -1 -8
y.1+0.3 -2.y+0.4 1 -2

2+3x -4+4x =-1 -8
y -2y 1 -2

y=1
2+3x=-1
3x=-3
x =-1

x+y=-1+1=0