.........................................

`6) x + 13 + 6 xx x = 62`

`x xx (1 + 6) + 13 = 62`

`x xx 7 = 62 - 13`

`x = 49 : 7`

`x = 7`

`7) 7 xx  (x - 11) - 6 = 757`

`7 xx (x - 11) = 757 + 6`

`x - 11 = 763 : 7`

`x = 109 + 11`

`x = 120`

`8) x + (x + 5) xx 3 = 75`

`x + x xx 3 + 15 = 75`

`x xx 4 = 75 - 15`

`x = 60 : 4`

`x = 15`

$@Thwantobethebest$