Question

The sum of two numbers is 57. One of the numbers is 21. Which of the following equations could be used to find the other number?

Answer 1

x + y = 57

x = 21

find y

Answer 2

57=21+x

Answer 3

x=57 -21

Answer 4

explain more hob

Answer 5

x = 36

Answer 6

the sum of two numbers x and y is 57
=> x+y=57
if y=21
=> x+21 = 57
=> x=57-21

Answer 7

\[n_1+n_2=57\]