Solve by substitution #13 X+2y = 8 2x-y = 1 #15 X+3y = 16 4x-2y = -20 #17 3x-4y = -7 X - 4y = 3 Solve by addition method (elimination) #21 2x + 4y = 2 -2x + 3y = 12 #23 5x - 2y = -3 3x + y = 7 #25 2x -3y = 7 4x + 2y = 6 #33 Two cans of cola and one can of root beer contain 149 grams of sugar. Three cans of cola and four cans of root beer contain 336 grams of sugar. How many grams of sugar are there in each? #35 A shop has a special rate for changing all the tires on motorcycles or cars. During a week where the shop changed the tires on 38 vehicles at the special rate, 110 tires were replaced. How many motorcycles and how many cars had all the tires replaced? #37 A broker purchased two bonds for a total of $150,000. One bond earns 4% simple annual interest, and the second one earns 2% simple annual interest. If the total annual interest from the two bonds is $5,400, what was the purchase price of each bond? #39 At a food stand outside of a European train station it is possible to buy hot dogs and beer. To purchase three hot dogs and two beers it costs 8.25 euro. For two hot dogs and three beers it costs 8.00 euro. How much does the stand charge for a hot dog? How much does it charge for a beer