×+y=5 2×+y=2 ×-2y=6 2×-y=9
Matematika
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Pertanyaan
×+y=5
2×+y=2
×-2y=6
2×-y=9
2×+y=2
×-2y=6
2×-y=9
1 Jawaban
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1. Jawaban MazQun
1)
x+y=5
2x+y=2
_____ -
-x = 3
x = -3
x + y = 5
y - 4 = 5
y = 5 + 4
y = 9
2)
×-2y=6 (x2
2×-y=9
2x - 4y = 12
2x - 9y = 9
_______ -
5y = 3
y = 3/5
x - 2y = 6
x - 2(3/5)= 6
x - 6/5 = 6
x = 6/5 + 6
x = 6 6/5
x = 7 1/5