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2023-08-04 09:17:04
` 16<a<b`
`20>c>b`
`=>16<a<b<b<20/
`=> a= 17`
`b = 18`
`c = 19`
2023-08-04 08:11:10
`4 . (1/2 - x) -1/3 = 7x - 1/4`
`=> 4 . (1/2 - x) - 7x = -1/4 +1/3`
`=>2 - 4x - 7x = 1/12`
`=> -11x = 2 - 1/12`
`=> -11x = 23/21`
`=> x = -23/132`