Tentukan nilai campuran 2x-y-7=0 x+y-2=0

By Admin ReiPosted on December 5, 2022

Tentukan nilai campuran 2x-y-7=0 x+y-2=0

Jawaban:

$2x - y = 7 : ( times 1) \ x + y = 2 : ( times 2) \ - - - - - - - - - - \ 2x - y = 7 \ 2x + 2y = 4 \ - - - - - - - - - - \ - 3y = 3 \ y = frac{3}{ - 3} = - 1 \ \ x + y = 2 \ x - 1 = 2 \ x = 2 + 1 = 3$