Please I NEED HELP AS SOON AS POSSIBLE! Two students were given the same problem of 2x - 4 = 6 to solve . Student A got an answer of x = 5 and Student B got an answer of x = 7 7. Which student is correct and what mistake did the other student make when solving for x? Explain your answer and refer to the work (below) that each student showed for their solution .

Student A is correct and student B made the mistake

Step-by-step explanation:

Student B divided 2 on both sides before subtracting four, when they should've done it the other way around: add four on both sides and then divide by 2 to solve for x

answer:

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

explanation:

service only with 20% tip  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

in the opening of the question the word 'service' is associated only with the pretax value.

the closing part of the question asks: how much did she pay for the  

service

−−−−−−  

so technically the answer is  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

however, the intention of the question provider may have been that your answer is to be  

$

87.12

(

1

+

8

100

)

=

$

94.09

to 2 decimal places.

'

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

tony b

mar 21, 2017

answer:

trying to explain it another way

explanation:

service charge  

.

→

$

72.60

20% tip  

20

100

×

$

72.60

=

$

14.52

−−−−−−  

←

add

$

87.12

tax  

8

100

×

$

87.12

=

$

6.97

−−−−−  

←

add

$

94.09

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