Toán Lớp 7: Câu2:
a | 2x – 5 | + 3x = 12
b | x + 1 | + | x + 2 | + | x + 3 |
c X mũ 2 + |x + 2 | = x mũ 2 + 3
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Toán Lớp 7: Câu2:
a | 2x – 5 | + 3x = 12
b | x + 1 | + | x + 2 | + | x + 3 |
c X mũ 2 + |x + 2 | = x mũ 2 + 3
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