Answer:
it ix 23 then 43
Step-by-step explanation:
Easiest way to work it out is to divide by ten, that gives 10% of your original number. Multiply that by two to get 20% and minus that from the original number to get the discount.
450/10 = 45 which is 10% of 450.
20% of 450= 10% x 2 or 45 x 2
therefor 20% of 450 is 90.
450-90 = the discount the shoppers recieve.
here,
2x-6y= -12
2(x-3y)= -12
x-3y = -6...........eq1
x+2y=14............eq2
we can subtract the above two given equations
we get,
![x - 3y = - 6 \\ x + 2y = 14](https://tex.z-dn.net/?f=x%20-%203y%20%3D%20%20-%206%20%5C%5C%20x%20%2B%202y%20%3D%2014)
___________
![- 5y = - 20](https://tex.z-dn.net/?f=%20-%205y%20%3D%20%20-%2020)
so,
y=4
now to find the value of x we have to substitute the value of y in any of the above two equations, I choose eq2
we get,
![x + 2y = 14 \\ x + 2 \times 4 = 14 \\ x + 8 = 14 \\ x = 14 - 8 \\ x = 6](https://tex.z-dn.net/?f=x%20%2B%202y%20%3D%2014%20%5C%5C%20x%20%2B%202%20%5Ctimes%204%20%3D%2014%20%5C%5C%20x%20%2B%208%20%3D%2014%20%5C%5C%20x%20%3D%2014%20-%208%20%5C%5C%20x%20%3D%206)
<h3>so,</h3><h3> x=6,y=4</h3>