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Bab Persamaan GarisMatematika SMP Kelas VIII
(3, 4)
Uji pilihan
a] 4x + 2y = -6 → x = 3
4 . 3 + 2y = -6
2y = -6 - 12
y = -18 : 2
y = -9 (seharusnya 4, maka jawabannya salah)
b] 4x - 2y = 6 → x = 3
4 . 3 - 2y = 6
12 - 2y = 6
-2y = 6 - 12
y = -6 : -2
y = 3 (seharusnya 4, maka jawabannya salah)
c] 4x + 2y = 6 → x = 3
4 . 3 + 2y = 6
2y = 6 - 12
y = -6 : 2
y = -3 (seharusnya 4, maka jawabannya salah)
d] 4x - 2y = -6 → x = 3
4 . 3 - 2y = -6
-2y = -6 - 12
y = -18 : -2
y = 9 (seharusnya 4,maka jawabannya salah)
tidak ada di pilihan
a) 4.3 + 2.4 # -6
b) 4.3 - 2.4 # 6
c) 4.3 +2.4 # 6
d) 4.3 -2.4 # -6 ( # tidak sama )
Jadi tak satu garispun yang melalui (3, 4)