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Student •X IPS
1 Selesaikan sistem persamaan linear tiga variabel berikut! (x + y + z = 2 2x -y-Z=4 x + 2y + 32 = 1 Jawab:
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Angela Gracelly
Student •XII IPA
x 2 u+ y + z = 2 au-y-z = 4 U +2y +32 = 1 ar-y-z = 4 U +24+32 = 1 XI 42-24-22 8 U +2y+32=1 52 + z = 9 ( +2 = 2 2U-Y-Z = 4 3U = 6 U=2 + 5 U+2 = 9 5.2 + 2 =9 z =9-10 Z = -1 au-y-z = 4 2.2-y-(-1) = 4 4-y+ 1 = 4 - Y+5 = 4 - y = 4-5 -y=-1 y = 1 (u, y, e) (2,1,-1)
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