Question

The sum of 20.7 and a number is 50.5.

Answer 1

x = 29.8

Explanation:

x represents the unknown number

20.7 + x = 50.5

x + 20.7 - 20.7 = 50.5 - 20.7

x = 50.5 - 20.7

x = 29.8

Answer 2

20.7 +x = 50.5

To solve it
x= 50.5 - 20.7
x = 29.8