Question

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


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


26
28 - my choice
32

Am I right?

Answer 1

28 is correct.

Answer 2

Thank you!! Is the first one also right?

And another...
If t = the tens digit and u = the ones digit, which expression shows the value of interchanging the digits in a two digit number?


u + t - I guessing it'd be this, but the question doesn't make any sense
10u + t
u + 10t

Answer 3

So, if the problem says x is the larger number (by 4). Then y = x-4.
x - y = 4. So, yes, the your choice is correct.

Answer 4

Ok, thank you!! And do I have the one in the replies correct also?

Answer 5

I'm looking at the next question. You're right it is a bit cryptic.

Answer 6

So, the way I read it, they are consider a number like 35 and then asking how would we make 53 instead? Does it read that way to you?

Answer 7

I honestly don't know.

Answer 8

So, the last one doesn't make sense because if t is the 10s and we multiple by 10, we'll get a three digit number. So that one is out.

Answer 9

Ok, makes sense.

Answer 10

If we do nothing with the 10s (or t) but multiply 1s by 10 (like the second answer) then we create a new number altogether. So, I would select number 1 as my answer too.

Answer 11

Ok, thank you!!!

Answer 12

Welcome. Have a good morning.