Question

Help!
Please explain how I do this STEP BY STEP!
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Answer 1

@AnswerMyQuestions @iGreen

Answer 2

Cross multiply.

Answer 3

How do I do that with that problem?

Answer 4

\(\dfrac{1}{7} = \dfrac{3}{4x-1}\)

\(\dfrac{1}{7} \nearrow \dfrac{3}{4x-1}\)

\(\dfrac{1}{7} \searrow \dfrac{3}{4x-1}\)

Giving us:

(1)(4x - 1) = (7)(3)

Answer 5

1 times anything equals itself.

4x - 1 = (7)(3)

Simplify

Answer 6

7*3=21 1*4=4

Answer 7

What is the (7)(3) for

Answer 8

\(\dfrac{1}{7} \nearrow \dfrac{3}{4x-1}\)

Answer 9

Yes, so we have:

4x - 1 = 21

Add 1 to both sides.

Answer 10

Ok so you just do the denominter on the 2nd problem then you do the demoninater on the first problem * the numerater on the second.

Answer 11

Is this something you would do for every problem like this?

Answer 12

Yep

Answer 13

If they're proportions..fractions that equal each other.

Answer 14

So if it equals 21 how would I turn it into a fraction

Answer 15

?

Why would we want to do that?

Answer 16

4x - 1 = 21

Solve this

Answer 17

Look at the problem we have to put in a fraction and its 21 right?

Answer 18

No, 21 isn't the answer.. we have to solve that equation.

Answer 19

Add 1 to both sides then divide 4 to both sides.

Answer 20

Wait why do we do that

Answer 21

How would I add 1 to both sides and why do I divide by 4

Answer 22

That's how you solve the equation..we're isolating the variable.

Answer 23

Im sorry I have a really hard time understanding things

Answer 24

4x - 1 = 21

We want to get rid of '1' and '4' to get 'x' by itself. We do the opposite to keep the equation balanced. So since 1 is being subtracted, we add it to both sides.

Answer 25

So how would that be written out?

Answer 26

@igreen help please ^

Answer 27

@confluxepic

Answer 28

@sammixboo