matrik x dari 2a-b+x=0 untuk a=[3 1] [2 4] dan b=[0 1] [-1 2] adalah...

2a - b + x = 0
x = -2a + b

x = -2[3 1] + [0 1]
[2 4] [-1 2]
= [-6 -2] + [0 1]
[-4 -8] [-1 2]
x = [-6 -1]
[-5 -6]