Question

40 цел. 5/12 + x = 61 цел. 4/15

Answer 1

40 цел. 5/12 + x = 61 цел. 4/15

x = 61 4/15 - 40 5/12

x = 61 16/60 - 40 25/60

x = 20цел. 51/60

Answer 2

$\frac{485}{12} + x = \frac{919}{15} \\ \\ x = \frac{919}{15} - \frac{485}{12} \\ \\ x = 20.85$