The total will be 57.23. Because tax would be 4.24 and add it to 52.99 and you get 57.23.
So here the denominator is 5 and the numerator is 3. If you double 3, you get 6 and to make the fraction equal to 1, you have to make the denominator 6. So we do 6-5 which is 1
6x+5y=-15
5y=-15-6x
y=(-15-6x)/5
