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3x + 2y=9 | 1 |
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4x + 2y = 10
3x + 2y = 9
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x = 1
masukkan x = 1 ke pers 2
3x + 2y = 9
3(1) + 2y =9
3 + 2y = 9
2y = 9-3
y = 6/2
y= 3