решить уравнения
а) 3/7 x = 0,8 x - 17/35
б) 5*(x-7) = 3*(x-4) - 27
в) 1 - 1,5x + 3 2/5 x = 1 1/3x - 2 7/15 x - 2 1/2

А

https://www4c.wolframalpha.com/Calculate/MSP/MSP27281819igfd9i1c956600000fa7i5ie41e5fea5?MSPStoreType=image/gif&s=37

 Б

https://www4b.wolframalpha.com/Calculate/MSP/MSP53262301df19eg8d675a000025ghagb1fech71h6?MSPStoreType=image/gif&s=14

В

https://www4f.wolframalpha.com/Calculate/MSP/MSP3735190baddced9i0851000044a2g537ha474b73?MSPStoreType=image/gif&s=25