3x minus one over five times the quantity 10x plus 5 equals 6 step 1: 3x – 2x – 1 = 6 step 2: x – 1 = 6 step 3: x – 1 – 1 = 6 – 1 step 4: x = 5 in which step was the error made and why?

The error was made in third step, because in this step 1 is subtracted instead of adding.

Step-by-step explanation:

Given equation,

3x minus one over five times the quantity 10x plus 5 equals 6

Step 1 : Apply distributive property on the left side,

Step 2 : By subtraction property on the left side,

Step 3 : Adding 1 on the both sides ( for isolating x on left side )

Step 4 : Combine the like terms,

Hence, by the above explanation it is clear that there was an error in third step,

Reason : 1 is subtracted instead of adding.

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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