You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter shahar
- Start date

- Joined
- Jan 29, 2005

- Messages
- 11,785

[imath]a+b=4(a-b) \Rightarrow 3a-5b=0[/imath]The question is:a and b are whole numbers.Given: a + b = 4(a - b) hence:

b divided by the factor:

(1) 8 (2) 7 (3) 3 (4) 5

Can somebody help me with it?

I don't have the answer.

Happy New Year (Hebrew Year).

Beyond that, I have not a clue what your question means.

- Joined
- Jul 19, 2018

- Messages
- 422

Now am I clear to you?[imath]a+b=4(a-b) \Rightarrow 3a-5b=0[/imath]

Beyond that, I have not a clue what your question means.

- Joined
- Jul 19, 2018

- Messages
- 422

Is in the answer 3 or 5?b is guaranteed to bedivisibleby which multiplier? @pka's hint in post #2 can be quite helpful in figuring out the answer.

I thinks the answer number 3 because the variable

I want to formulate an answer. How I do it?

D

a + b = 4a - 4bThe question is:

a and b are whole numbers.

Given: a + b = 4(a - b)

hence:

b divided by the factor:

(1) 8

(2) 7

(3) 3

(4) 5

Can somebody help me with it?

I don't have the answer.

Happy New Year (Hebrew Year).

a = (5/3) * b ********************************corrected

3 and 5 are relatively prime and

a & b are integers, - hence

3|b ********************************corrected

Continue.....

Last edited by a moderator:

a + b = 4a - 4b

. . .

3 and 5 are relatively prime and

a & b are integers, - hence

5|b \(\displaystyle \ \ \ \)?

Subhotosh Khan,

a + b = 4a - 4b

5b = 3a

3 does not divide 5, because they are relatively prime,

and a & b are integers.

Hence, it remains that \(\displaystyle \ \) 3|b.

D

You are correct - I made a mistake. That should have beenSubhotosh Khan,

a + b = 4a - 4b

5b = 3a

3 does not divide 5, because they are relatively prime,

and a & b are integers.

Hence, it remains that \(\displaystyle \ \) 3|b.

3*a = 5*b → b|3

|_ |_