Question

please help me, i am struggling with math

the sum of two numbers is 7. one number is three more than the other. find the smaller number.

a.-4
b.2
c.4
d.8

Answer 1

Hi there! Do you know how to solve systems of linear equations?

Answer 2

no!

Answer 3

are you willing to?

Answer 4

Let two numbers be x and y
x + y = 7
x = y + 3
x = 7 - x + 3
2x = 10
x = 5

Answer 5

OK. We can probably do this without it, actually. let's call 'x' the smaller number. What's the value of the larger number?

Answer 6

can you show me how you got the answer? please?

Answer 7

b.2

Answer 8

x + x + 3 = 7
2x + 3 = 7
2x = 4
x = 2

Answer 9

x=5
x+y = y
y = 2

Answer is b.

Answer 10

One number is 3 larger than the other, right?
So if 'x' is the smaller number, how can we write the larger number, in terms of x?

Answer 11

ktklown - you are a good person!

Answer 12

haha, thank you :-)

Answer 13

You are trying to teach. I was trying to do same. Not always what is needed. Giving answer is what is needed.

Answer 14

For people who are just trying to get the answer I try to send them to wolfram alpha so we can spend time here actually trying to teach

Answer 15

But it is pointless just to give out answer

Answer 16

x+y=7
x+(3+x)=7
2x+3=7
x = (7 -3)/2
x= 2

Answer 17

GT giving the answer is stupidity, useless and baseless if the person doesn't understand

Answer 18

I understand. Lot of times you are ignored if you try to teach.

Answer 19

but sometimes they are in a test or quiz and they are in a hurry

Answer 20

The people who ignore efforts to teach, I tell to go to wolfram, or I ignore, or if they're being mean I give them the wrong answer

Answer 21

If they are in a hurry, they should fail.

Answer 22

"they're being mean I give them the wrong answer"

don't waste time doing that

Answer 23

I don't help ppl to fail and neither would i help them to cheat, if what i tell u turns out to be wrong, you'll blame me... u need to know why i'm writing what i did... that's how you learn. don't give out answers if the person is in a hurry. lets say the person is in the middle of a test... giving the person an answer because the person is in a hurry means helping the person to cheat.... you wouldn't give the answer if u were there with the person in the exam room...