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7x + 2y = 19 Ix3 ⇒ 21x + 6y = 57 7x + 2y = 19
4x - 3y = 15 Ix2 8x - 6y = 30 7.3 + 2y = 19
---------------- + 21 + 2y = 19
29x = 87 2y = -2
x = 3 y = -1
3x - 2y = 3.3 - 2.(-1)
= 9 + 2
= 11
4x-3y = 15 (*2)⇒ 8x-6y = 30 +
29x = 87
x = 3, maka 4x-3y = 15
4(3)-3y= 15
-3y=3--> y = -1
3x-2y = 3(3)-2(-1) = 9+2=11