Question

There are two person both have more than one pen. 1st one says if you give me one pen i will have double number of pen as you have . 2nd says if you give me one pen we both have equal number of pen . find the number of pen each have​

Answer 1

Let 1st person have $x$ no. of pens and 2nd person have $x$ no. of pens currently. Then we have two equations according to the question,

$x+1=2(y-1)\quad\longrightarrow\quad (1)$

This is according to what 1st person said, and,

$x-1=y+1\quad\longrightarrow\quad (2)$

This is according to what 2nd person said.

From (2),

$y=x-2$

And then from (1),

$x+1=2(x-3)\\\\x+1=2x-6\\\\\underline{\underline {x=7}}$

And, then,

$\underline {\underline {y=5}}$

Answer 2

Answer:

7 and 5

Step-by-step explanation:

because

6=6

8 is double of 4