Question

Medal and fan reward

Answer 1

google

Answer 2

if Kevin is x years old, and Luis is 4 years older then Kevin, then Luis is x+4 years older than Kevin, but he's also three times his age so that is 3x, so you have that 3x+(x+4)=0
solve for x and that's Kevin's age :P

Answer 3

it looks weird lol but 3 times 1 is 3 so that is 3 times Kevin's age, and 3 is 4 units away from -1, so it is valid

Answer 4

its incorrect

Answer 5

L = 3K
L = K + 4
so
3K = K + 4
subtract K from both sides
2K = 4
divide both sides by 2
K = 2

So Kevin is 2 years old
(and Luis is 6 years, but that was not asked for)

Answer 6

makes sense @abtster nice approach ;)

Answer 7

W + 32 = 3W
substract W from both sides
32 = 2W
divide both sides by two
16 = W

so William is 16 years of age

Answer 8

Do you get it how you can convert the text in equations?

Answer 9

No, I have trouble creating the equations...

Answer 10

Yeh thatś the tricky part
Try to put the required answer in a symbol
here: how old is William right now
So William's age is required
Call it W

now what is told about that age
In 32 years, something is the case
In 32 years, William will be 32 years older than now, so
W + 32 = something

what is the case in 32 years
He will be 3x as old as he is now
we called his present age W, so

something must be 3W

Now we have the equation
W + 32 = 3W

Answer 11

Stephanie is 4 times as old as Jessica and is also 21 years older than Jessica.
How old is Jessica?
S+21=4S :)!

Answer 12

S =4J
S = J + 21
So
4J = J +21
Hence
3J = 21
J = 7
S = 28

So Jessica is 7 years old

Answer 13

Sorry it was just the other way around as what you thought.
Your eq. would lead to S is 7 years and that way,
she cannot be 21 years older than Jessica if she is only 21
(unless the questionmaker is a scicic :-) )

Answer 14

okay so In 20 years, Ishaan will be 3 times as old as he is right now.

How old is he right now?

The equation would be 3*x=x+20 which would equal 10.

Answer 15

Right, you got it
If you read the statement with the found age in mind, you can check that you got the right answer

Answer 16

Just a sec, I'm answering another problem right now

Answer 17

I'm sure the equation will be.... set up different

Answer 18

They ask for Stephanie's age
Let S = Stephanies age
They could have asked for Jessica's age
Let J = Jessica's age

Now
Stephany is 28 years older than Jessica, so
S = J +28

For the last three years, Jessica and Stephany have been friends
--- Nice to know, but totally irrelevant for finding ages

Nine years ago, Stephany was 5 times as old as Jessica
S_nine_years_ago = 5J_nine_years_ago

Nine years ago they were both 9 years younger
So instead of J and S, we have J-9 and S-9
Hence
S-9 = 5(J-9)

So the equations that have to be solved, are
S = J +28
S-9 = 5(J-9)

The second eq can be simplified:
S = 5J - 45 + 9
So
S = 5J - 36

Using the first S = J +28 gives
5J - 36= J +28
Hence
4J = 64
or
J = 16

We had
S = J +28
S = 44

Stephany is 28 years older than Jessica - OK

Nine years ago, Stephany was 5 times as old as Jessica
35 = 5*7
OK

Answer 19

I wish I could give you more than one medal xD

Answer 20

It's OK

I hope you've gotten the hang of it

Answer 21

thanks for the medal