Please explain

Question

y-  3 - y-2  = -1

  3        2  

Answer 1

Assuming:

(y - 3)/3 - (y - 2)/2 = -1

2(y - 3) - 3(y - 2) = -6    multiply both sides by LCD

2y - 6 - 3y + 6 = -6        distribute

-y = -6                          combine like terms

y = 6                            multiply both sides by -1