Toán Lớp 5: ( 5/7 – y ) x 14/5 = 7/10 + 1/2
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Toán Lớp 5: ( 5/7 – y ) x 14/5 = 7/10 + 1/2
Comments ( 2 )
=>(5/7-y)xx14/5=7/10+5/10
=>(5/7-y)xx14/5=12/10
=>5/7-y=12/10:14/5
=>5/7-y=12/10 xx5/14
=>5/7-y=3/7
=>y=5/7-3/7
=>y=2/7
Vậy y=2/7