Question

An equation is shown below:

5(2x - 8) + 15 = -15

Write the steps you will use to solve the equation and explain each step.

Answer 1

Any ideas?

Answer 2

not really :S

Answer 3

first we have to do whats in the parenthesis

Answer 4

right?

Answer 5

How about subtracting 15 from both sides first, then divide both sides by 5?

Answer 6

ok give me a sec

Answer 7

so it would be -30 right? on one side

Answer 8

Yup.

Answer 9

divided by 5 = -6

Answer 10

Yup

Answer 11

so now its (2x - 8) = -6

Answer 12

?

Answer 13

Correct

Answer 14

so what do we do now

Answer 15

Remove the parentheses

Answer 16

ok so 2x - 8 = -6

Answer 17

Correct

Answer 18

next... lol

Answer 19

What is your goal?

Answer 20

solve the equation

Answer 21

Isolate x means get x alone on one side of the equation, right?

Answer 22

i guess yeah

Answer 23

yes

Answer 24

Any ideas? Recall what we did earlier :-)

Answer 25

add 8?

Answer 26

it would = 2

Answer 27

Yes, to both sides

Answer 28

so then it would be 2x = 2

Answer 29

Yup

Answer 30

so then?

Answer 31

What value of x will make 2x = 2 a true statement?

Answer 32

1

Answer 33

Correct, now go back to the original equation and check it.

Answer 34

so i plug in 1 for x

Answer 35

Yup

Answer 36

5(2*1 - 8) + 15 = -15

Answer 37

how do i check it? idk where to start

Answer 38

Inside the parentheses

Answer 39

lol

Answer 40

2 - 8?

Answer 41

-6

Answer 42

Yup

Answer 43

so then is that it or what lol

Answer 44

5(-6) + 15 = ?

Answer 45

-30 + 15 = -15

Answer 46

Is -15 = -15 a true statement?

Answer 47

yes

Answer 48

done? thanks!

Answer 49

You have just proven that x = 1 is the solution :D

Answer 50

lol thanks

Answer 51

Thanks for trying to learn.