Question

Can someone please give me the (Answers) to this? ... please ...

I need help….

Answer 1

7.
`(15)/(21) =(25)/(25 +?)\\15(25+?) = 21*25\\375 + 15*? = 525\\? = 10`

8.
`(?)/(77) =(30)/(30+25) \\?(30+25)=77*30\\55? = 2310\\? = 42`

9.
`(11-5)/(11) =(?)/(22) \\22(11-5) = 11(?)\\132 = 11*?\\? = 12`

10
`(?)/(?+28) =(8)/(8+16) \\(?)/(?+28) =(8)/(24) \\8(?+28)=24?\\8?+224=24?\\16? = 224\\? =14`