<span>First, you need to take the 15% off from the $120 so it will make it easier for you to calculate later. Since there is 15% off, your $120 becomes only $102. Since your keyboards only costs $102 each now, you just have to multiply the number of keyboards you wanted to the less price. $102 multiplied by 24 keyboards is equals to $2,448. We don’t have to add taxes because it is stated that we are just looking for SUBTOTAL before taxes. The answer is A. $2,448. <span>
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Answer:
![6x-6y=30](https://tex.z-dn.net/?f=6x-6y%3D30)
Step-by-step explanation:
<u><em>The complete options are</em></u>
a) x - 2y = 30
b) 4x - 3y = 30
c) 3x - 4y = 30
d) 6x - 6y = 30
The given equation is
![x-y=5](https://tex.z-dn.net/?f=x-y%3D5)
<u>Verify option d</u>
we have
![6x-6y=30](https://tex.z-dn.net/?f=6x-6y%3D30)
Divide by 6 both sides
![(6x-6y)/6=30/6](https://tex.z-dn.net/?f=%286x-6y%29%2F6%3D30%2F6)
![\frac{6x}{6}-\frac{6y}{6}=\frac{30}{6}](https://tex.z-dn.net/?f=%5Cfrac%7B6x%7D%7B6%7D-%5Cfrac%7B6y%7D%7B6%7D%3D%5Cfrac%7B30%7D%7B6%7D)
![x-y=5](https://tex.z-dn.net/?f=x-y%3D5)
therefore
and
are equivalent
2x + 4(x - 1) = 2 + 4x
2x + 4x - 4 = 2 + 4x
6x - 4 = 2 + 4x
6x - 4x = 2 + 4
2x = 6
x = 3........there is 1 solution
25 - x = 15 - (3x + 10)
25 - x = 15 - 3x - 10
25 - x = -3x + 5
3x - x = 5 - 25
2x = - 20
x = -20/2
x = -10.....there is 1 solution
4x = 2x + 2x + 5(x - x)
4x = 4x + 5x - 5x
4x = 4x......this has infinite solutions
learn this...
if ur equation ends in a variable equaling a number, then there is one solution.
if ur equation ends in something not equal, like 2 = 4, or 4 = 6, then there is 0 solutions.
if ur equation ends in something equal to something,(the same) like 2 = 2, or 4x = 4x, then there is infinite solutions
9 decimeters. deci = 0.1
9 *0.1 meters.
0.9 meters
9 decimeters = 0.9 meters.