Let the price of a pizza be x Delivery charge be y Cost of two pizzas = 2*x 2x+y=25. ————-(1) Y=25-2x Cost of 5 pizza = 5*x 5x+y=58. —————-(2) Substitute y=25-2x in equation 2 5x +25-2x=58 3x+25=58 Subtract 25 from both sides 3x =58-25 3x=33 Divide both sides by 3 X=33/3 X=11 Plug-in x= 11 in equation 1 2*11+y=25 22+y=25 Y=25-22 Y=3 Cost of a pizza =$11 Delivery charge=$3
