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

\[\sum = number_1 + number_2\]\[57 = 21 + number_2\]\[number_2 = 57 - 21 = 36\]

of course, this could also be "number 1" ;)

Answer 2

what are the choices

Answer 3

57 = n + 21
57 = 2 + 21
21 = n – 57
n = 57 + 21
Not Here

Answer 4

carolsan: the first equation is the correct one. :)

Answer 5

the first

Answer 6

cool thx guys