Fractional addition and subtraction (1) / (x + 1) + (2) / (x + 1)

Fractional addition and subtraction (1) / (x + 1) + (2) / (x + 1)

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