1)11/15x =77;2)15/64x=25;3)3 2/5y =6 4/5помогите!!!!

9/16 - х = 1/2
х = 9/16 - 1/2 = 9/16 - 8/16
х = 1/16
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х + 2/3 = 7/8
х = 7/8 - 2/3 = 21/24 - 16/24
х = 5/24
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1/2 + х = 23/24
х = 23/24 - 1/2 = 23/24 - 12/24
х = 11/24
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х - 3/8 = 1/4
х = 3/8 + 1/4 = 3/8 + 2/8
х = 5/8

<span>(a</span>²<span>b+ab)/ab=ab(a+1)/ab=a+1.</span>