Question

I have these on my study guide but for some reason I keep getting them wrong can someone break it down for me.

1. 2+4(x-7)=7-5(x-4)

2. 2(5z-1)-2(z+9)=3(z+1)

This one is a fraction:

-5/9x+2/3=5/9

Answer 1

can you show how you did these?

Answer 2

1. 2+4x-28=7-5x+20
4x-26=27+5x
+26
4x=53+5x
-5x
9x=53
/9
53/9=x

Answer 3

2. 10z-2-2z-18=3z+3
8z-20=3z+3
+20
8z=3z+23
-3
5z=23
/5
23/5=z

Answer 4

Thats all I know because the fraction one I dont understand at all.

Answer 5

ok. give me a sec

Answer 6

ok

Answer 7

1. 2+4x-28=7-5x+20
4x-26=27+5x
^
|
how did this become +? It was - in the line abnove.

Answer 8

^above

Answer 9

oh I accidentally changed it

Answer 10

Interestingly, later you made another mistake, and the answer came out correct.

Answer 11

I ended up with the same thing you did for both.

Answer 12

1. 2 + 4x - 28 = 7 - 5x + 20
4x - 26 = 27 - 5x
+5x +5x
------------------
9x - 26 = 27
+ 26 +26
--------------
9x = 53

x = 53/9

Answer 13

When I put them in my study it guide it say I have done it wrong.

Answer 14

Your final answer to problem 1 is correct, but you made two mistakes which somehow canceled each other.

Answer 15

okay could you show me what I did wrong

Answer 16

Problem 2.

2(5z-1)-2(z+9)=3(z+1)

10z-2-2z-18=3z+3 <---- correct

8z-20=3z+3 <----- correct
+20
---------------
8z=3z+23 <------- correct
-3 <----- should read -3z
5z=23
/5
23/5=z <----- correct final answer

Answer 17

You did problem 2 well.

Answer 18

Thank you but for some reason it is wrong

Answer 19

For the third one is it like this with the x beside -5/9? just want to make sure it's not in the denominator
\[-\frac{ 5 }{ 9 }x+\frac{ 2 }{ 3 }=\frac{ 5 }{ 9}\]

Answer 20

The answer is correct. Do they ask for a decimal instead of a fraction?

Answer 21

Yes peachpi and it ask for a integer or simplified fraction

Answer 22

ok. you can do the same thing you did for the others. Start by subtracting 2/3 from both sides, then you'll need to get a common denominator to subtract the fractions.