Toán Lớp 7: Tìm x,y biết (1+2y)/18=(1+4y)/24=(2+6y)/6x
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Toán Lớp 7: Tìm x,y biết (1+2y)/18=(1+4y)/24=(2+6y)/6x
Comments ( 1 )
Ta có:
(1) 1+2y/18 = 1+4y/24
=> 24 + 48y = 18 + 72y
<=> y=1/4
(2) 1+4y/24=1+6y/6x
Thay y=1/4 vào (2) ta tìm đc x=5 (thỏa)