When lines coincide how many solutions does each system have?
a. infinitely solutions
b. no solution
c. one solution

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer

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