V=<span>π r^(2)h
you put the number in the place of the R and H</span>
Alright this equation has two big steps. First we need to find the price after it was marked up, then we need to take that number and find the discounted price.
To find the cost after a percent of it was added, we just need to multiply the two together and add.
=
$
23.50
+
(
$
23.50
⋅
(
63
%
100
)
)
(we divide by 100 to get the number out of a percent)
=
$
23.50
+
(
$
23.50
⋅
0.63
)
=
$
23.50
+
$
14.81
=
$
38.31
Ok now that we have the number after the price increase, we now need to find the final answer after a discount of
50
%
(do the exact same idea as above but switch the sign)
=
$
38.31
−
(
$
38.31
⋅
(
50
%
100
)
)
=
$
38.31
−
(
$
38.31
⋅
0.5
)
=
$
38.31
−
$
19.16
=
$
19.15
Keywords:
<em>Equation, simplified, variable, compare
</em>
For this case, we have an equation of the form
, where 
. The equation was simplified and we want to find the value of
when the variable
and compare the result of both equations. So:
(1)
We apply distributive property to simplify, taking into account that: 
(2)
If , we substitute in the original equation and in the simplified equation:
1) 
2) 
Thus, when is substituted in both expressions, the result is 6.
Answer:
For and , substituting we have the result is 6.
Answer:
21/2 is your answer
Step-by-step explanation:
6x + 3y =21
6x + 3y - 21 = 0
3 (2x + y - 7) = 0
if you need to simplify it, ^ that would be my answer :)
