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x = 2 ; y = -3
(i) 2(2) +3(-3) = 4-9 = -5 {benar}
(ii) 3(2)-4(-3) = 6+12 = 18 {salah}
(iii) 3(2) +5(-3)=6-15 = -9 {salah}
(iv) 4(2)-3(-3) = 8+9 = 17 {benar}
jadi dari pilihan diatas yang memiliki penyelesaian (2,-3) adalah (i) & (iv)