tolong dibantu beserta penyelesainya

PLdV

1/3 x + 1/4 y = 2 1/6 ...kalikan 12 --> 4x + 3y = 26
1/2x - 1/3y = - 1 ...kalikan 6 --> 3x - 2y = - 6

eliminasi
4x + 3y = 26 ....kali 2
3x - 2y = -6.......kali 3
.
8x + 6y = 52
9x - 6y = - 18
.
17x = 34 --> x = 2

4x + 3y = 26
3y = 26 - 4x
3y = 26 - 4(2) = 18
y = 6

niloai 4x - 3y = 4(2) - 3(6) = 8 - 18  = -10