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y +2x = 8 x 2 2y + 4x =16................persamaaan 2
persman 1 dan 2 dikrangi jadi = -11x = -22
x = -22/-11
x = 2
sbtitsi:
y + 2x = 8
y + 2 (2) = 8
y + 4 = 8
y = 8 -4
y = 2