Answer:
50%
Step-by-step explanation:
12500 - 7500 = 5000
5000/100 = 50%
Answer:

Step-by-step explanation:
Equation: 
1). 
2). 
Answer:
3x-3
Step-by-step explanation:
You have to combine like terms. <em>x</em> and 2<em>x</em> have the same variable, so this equals 3x, and then you subtract 3 so:
x-3=2x-3-x
=3x-3