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y/6 - z/2 = -2 kalikan 6 ----> y - 3z = -12
x/3 + z/4 = 4 kalikan 12 ----> 4x + 3z = 48 ----- z = (48 - 4x)/3
y - 3z = -12
(24 - 2x) - 3(16 - 4/3 x) = -12
24 - 2x - 48 + 4x = -12
2x = -12 - 24 + 48
2x = 12
x = 6
y = 24 - 2x
y = 24 - 2(6)
y = 12
z = (48-4x) / 3
z = (48 - 24) / 3
z = 8
x + y + z = 6 + 12 + 8
= 26