Answer:
b
Step-by-step explanation:
because that is the correct answer believe me
25 percent of x is equal to $1631.24
.25*4 is equal to 100 percent
Substitute
1631.24*4=x
x=6524.96
and 
use the second expression to calculate the left-hand side of the first equation:

Add 10 to both sides if this equation to get

and divide both sides by 2

this proves that x = 17, give the two initial equations
Answer:
rule add 15 subtract 10
Step-by-step explanation:
rule add 15 subtract 10