Question

2/3s+5/6s=21 solve for s

Answer 1

2/3s + 5/6s = 21

can also be written as 2s/3 + 5s/6 = 21

4s/6 + 5s/6= 21 (by making them like terms)

(4s+5s)/6 = 21 (adding the like terms)

4s+5s= 21 X 6 (transposition)

9s= 126

s= 126/9

Thus, s= 14

Hope this helps :-)