Question

~~~99 POINTS~~~

Answer 1

Let normal price=y
Let modified price=x
12% off=88% of normal price, without tax=.88*x without tax.
Tax=additional 3%=1.03*price=1.03*.88*x=.9064x
Since .9064x is our final modified price, the equation is 
y=.9064x
y=1.03*                               .88*                   x
     ^ Sales tax multiplier      ^12% off sale   ^ original price

Hope this helps!

Answer 2

Percent means parts out of 100, remember that

12% off

12% off means 100%-12%=88%
find 88% of that
then take 3% and addd that
3% off of 100=100+3=103% of that

then



so original price=p
find 88% of that then 103% of that

p*0.88*1.03=final cost
p*0.9064=final cost
0.9064p=final cost