color(blue)( -1/3) (6h + 15)
**Method 1: **
= color(blue)(( -1/3)) * (6h) + color(blue)(( -1/3)) * ( 15)
= color(blue)(( -1/cancel3)) * (cancel6h) + color(blue)(( -1/cancel3)) * ( cancel15)
= -2h - 15
= -(2h + 15)
Method 2:
color(blue)( -1/3) * (6h + 15)
3 is common to both terms within the bracket.
= color(blue)( -1/3) * color(green)((3)) * (2h + 5)
= color(blue)( -1/cancel3) * color(green)((cancel3)) * (2h + 5)
= - (2h +15)