tlong dijawab pake cara ya!

[2...-4] + 2[x..-3] = [3...-1][3...-2]
[y.....2].......[1....3]....[0...2][-1....4]

[2..-4] + [2x..-6]
[y....2]....[2......6]

= [3×3+(-1)×(-1)..3×(-2)+(-1)×4]
...[0×3+2×(-1)....0×(-2)+..2×4]

[2+2x..-4+(-6)] = [9+1..-6+(-4)]
[y+2.........2+6]....[0+(-2)..0+8]


[2+2x..-10] = [10...-10]
[y+2.......8].....[-2......8]


2 + 2x = 10
2x = 10 - 2
2x = 8
x = 8/2
x = 4

y + 2 = -2
y = -2 - 2
y = -4

3x - y
= 3(4) - (-4)
= 12 + 4
= 16 (E)