Question

A certain keyboard has five more than twice as many keys across as it does vertically. This special keyboard has a total of 168 keys. Find the amount of keys positioned vertically and across.

Answer 1

@IMStuck

Answer 2

@aum

Answer 3

@courtney1967 show me how to figure

Answer 4

@Cosmichaotic

Answer 5

Lets draw a picture.

Can you show me, first, what 5 more than twice a number looks like in numbers. Say we call x the number.

Answer 6

5+2x

Answer 7

?

Answer 8

Perfect!

Answer 9

yay!

Answer 10

Now we know that the total number of keys are 168 right?

Answer 11

yess

Answer 12

So 5 more than twice a number of keys gives us 168 keys. What equation can you write that shows this?

Answer 13

5+2x=168

Answer 14

Dude.. rock on!

Answer 15

Alright, let's see what x is.

Answer 16

yess feels good to know it

Answer 17

How would you find out what x is in 5+2x=168?

Answer 18

-5 from 168 and 5

Answer 19

or divide?

Answer 20

by 2

Answer 21

Right! So we subtract 5 from both sides.

2x = 168 - 5
2x = 163

So now what?

Answer 22

divide by 2

Answer 23

but 2 doesent go in 163

Answer 24

81.5

Answer 25

Your right, so we made a mistake. Do you see where?

Answer 26

by subtracting 168-5

Answer 27

We said that 2x + 5 was equal to 168 keys, but we needed to look at it this way.

Answer 28

it 80

Answer 29

its

Answer 30

thats the height

Answer 31

I mean