Question

the sum of two rational number 21/3 . if one of then i -5/6 . find the other .

Answer 1

Let other number is x



Their sum = 21/3


$- \frac{5}{6} + x = \frac{21}{3} \\ \\ \\ \\ \\ x = \frac{21}{3} + \frac{5}{ 6 } \\ \\ \\ \\ x = \frac{42 + 5}{6} \\ \\ \\ x = \frac{47}{6}$



Hence, other number is 42/5

Answer 2

x + -5/6 = 21/3
x -5/6 = 7
x = 7 + 6/5
x = 35/5 + 6/5
x = 41/5