Question 271826
Subtract: x/3 - (2x - 1)/-3 They say answer is 3x -1 /3. I would like to know why it is -1 and not +1. thank you

x/3 - (2x-1)/-3 =
x/3 + (2x-1)/3 =
(x+2x-1)/3 =
(3x-1)/3