6/7s-3/4=4/5-1/7s+1/6

Answer 1

6/7s-3/4=4/5-1/7s+1/6
6/7s + 1/7s = 3/4 + 4/5 + 1/6
s = 45/60 + 48/60 + 10/60
s = 103/60 = 1 43/60

Check my math.

Answer 2

the denominators are 7,4,5,7, and 6
so the LCD is 420
so multiply each term by 420
360s - 315 = 336 - 60s + 70
360s+60s = 336 + 70 + 315
420s = 721
s = 721/420
s = 103/60