Why is 4x and 15 + x equal

if 4x = x+15

that means that x = 5. so, 3x=15 making the equation

4x = x+3x (aka 4x = 4x)

therefore, they're equal

hope this helps!

the answer to the question is a  

it has the same slope and the same y-intercept.

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5