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WARRIOR [948]
3 years ago
8

Tìm x, y, z biết : 1. x/7=7/x 2.x-2/5=3/8

Mathematics
1 answer:
Lina20 [59]3 years ago
7 0
1. x.x=7.7 (nhân chéo)
<=>x^2 = 49
<=>x = 7
2. x= 31/40
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