The work of a student to solve the equation 2(3x − 4) = 8 + 2x + 4 is shown below:
Step 1: 2(3x − 4) = 8 + 2x + 4
Step 2: 5x − 6 = 12 + 2x
Step 3: 5x − 2x = 12 + 6
Step 4: 3x = 18
Step 5: x = 6
In which step did the student first make an error and what is the correct step?
Step 2; 6x − 6 = 2(6 + x + 2)
Step 2; 6x − 8 = 12 + 2x
Step 3; 5x − 2x = 12 − 6
Step 3; 5x + 2x = 12 + 6

- anonymous

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- schrodinger

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- anonymous

please help me

- anonymous

Step 1: 2(3x − 4) = 8 + 2x + 4
Step 2: 5x − 6 = 12 + 2x
Step 3: 5x − 2x = 12 + 6
Step 4: 3x = 18
Step 5: x = 6

- anonymous

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## More answers

- LynFran

2(3x-4)=8+2x+4
6x-8=12+2x
6x-2x=12+8
4x=20
x=20/4
x=5
this is how this question shd be worked...

- anonymous

thanks can you help me with another

- LynFran

sure

- anonymous

Which of these is a simplified form of the equation 6y + 4 = 8 + 2y + 2y?
6y = 8
10y = 12
2y = 4
4y = 12

- LynFran

6y+4=8+2y+2y
6y+4=8+4y
6y-4y=8-4
2y=4
y=4/2
y=2

- LynFran

can u see it??

- LynFran

check the working i just did and look for the answer

- LynFran

correct

- anonymous

thanksss can u help with more

- LynFran

sure

- anonymous

How many solutions does the equation −3a + 3a + 6 = 7 have?
One
Two
Infinitely many
None

- LynFran

-3a+3a=0
so none

- anonymous

What is the solution to the equation 1.6m − 4.8 = −1.6m?
m = 0.5
m = 0.7
m = 1.5
m = 3

- LynFran

the a term cancel out each other

- LynFran

1.6m-4.8=-1.6m
1.6m+1.6m=4.8
3.2m=4.8
m=4.8/3.2
m=1.5

- anonymous

wowww ur amazing

- anonymous

would i be pushing it if i ask for more help?

- LynFran

nah

- anonymous

What is the value of x in the equation −6 + x = −3?
−9
−3
3
9

- anonymous

aye u got insta?

- LynFran

-6+x=-3
x=-3+6
x=3

- anonymous

What is the value of x in the equation −x = 4 − 3x + 6?
5
10
−5
−10

- anonymous

Which statement is true about the equation fraction 3 over 4z = fraction 1 over 4z − 3 + 5?
It has no solution.
It has one solution
It has two solutions.
It has infinitely many solutions.

- LynFran

-x=4-3x+6
-x=10-3x
-x+3x=10
2x=10
x=5

- anonymous

so D?

- LynFran

What is the value of x in the equation −x = 4 − 3x + 6?
x=5

- LynFran

\[\frac{ 3 }{ 4z }=\frac{ 1 }{ 4z }-3+5 \] is this the correct question/equation

- anonymous

How many solutions does the equation 6a − 3a − 6 = −2 + 3 have?
Two
None
One
Infinitely many

- LynFran

im talking about this question we havent started as yet
What is the value of x in the equation −x = 4 − 3x + 6?
It has no solution.
It has one solution
It has two solutions.
It has infinitely many solutions.

- LynFran

so this was the question
Which statement is true about the equation fraction 3 over 4z = fraction 1 over 4z − 3 + 5?

- LynFran

we havent started the above question as yet

- LynFran

but for this question How many solutions does the equation 6a − 3a − 6 = −2 + 3 have?
the answer is one

- anonymous

thxs

- anonymous

What is the value of z in the equation 2(4z − 3 − 1) = 166 − 46?
14
15
16
17

- LynFran

2(4z-3-1)=166-46
8z-6-2=120
8z=120+8
z=16

- anonymous

hey can u help with more

- LynFran

ok 3more but you have to look at the pattern of my solution when it comes to solving equation ok

- anonymous

k thxs

- anonymous

How many solutions does the equation −3y + 3y + 4 = 4 have?
Zero
Infinitely many
One
Four

- LynFran

-3y+3y+4=4
and
-3y+3y=0 so no solution

- vheah

The student committed an error on Step 2 because instead of multiplying 2 to 3x the student ended up adding the two, getting 5x.
Correct step is 6x-8 = 12x + 2x

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