Question

giving medals

One number is 4 more than another, and their sum is 60. What is the smaller number?

If x = the larger number and y = the smaller number, then which of the following systems could be used to solve the problem?



x + y = 60 and -x + y = 4

x + y = 60 and x - y = 4

x + y = 60 and x + y = 4

Answer 1

a b c

Answer 2

it is given that one number is 4 more than the other. so the larger number must be 4 more than the smaller number. so we get
y+4=x
their sum is given is 60. ie the addition of those two numbers give 60.
x+y=60

Answer 3

ok the second one

Answer 4

or the third

Answer 5

hhmmmmmmmmmmmmm

Answer 6

y+4=x
the diffrence between the numbers is 4. ie the subtraction of smaller number from the larger number gives 4

Answer 7

yup the second one

Answer 8

yup:)