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4x-3y = 18 |x 6| 24x-18y = 108 -
38y = - 76
y = -2
4x - 3y - 18= 0 |×5|⇔20x - 15y - 90 = 0+
38x - 114 = 0
38x =114
x = 3
6x + 5y - 8 = 0
6(3) + 5y - 8 = 0
18 + 5y - 8 = 0
5y = -18 + 8
5y = -10
y = -2
jadi, nilai y adalah -2