`c) ( 4/3 + x ) xx 7/4 = 5 - 7/6`
`=> ( 4/3 + x ) xx 7/4 = 23/6`
`=> 4/3 + x = 23/6 : 7/4`
`=> 4/3 + x = 23/6 xx 4/7`
`=> 4/3 + x = 46/21`
`=> x = 46/21 - 4/3`
`=> x = 6/7`
`( 4/3 + x) xx 7/4 = 5-7/6`
`( 4/3 + x) xx 7/4 = 30/6-7/6`
`( 4/3 + x) xx 7/4 = 23/6`
`4/3 + x= 23/6 : 7/4`
`4/3 + x= 23/6xx 4/7`
`4/3 + x=46/21`
`x= 46/21-4/3`
`x= 46/21- 28/21`
`x= 18/21`
`x= 6/7`