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Two groups of people went to see Avatar in IMAX 3D?

Two groups of people went to see Avatar in IMAX 3D. The first group spent $73. 50 on two adult and threechildren tickets. The othergroup spent $109. 50 on five adult and two children tickets. What is the cost for each type of ticket?

En resumen

2x + 3y = 73. 50 5x + 2y = 109. 50 (2x + 3y = 73. 5) - 5 (5x + 2y = 109. 5) 2 - 10x - 15y = - 367. 5 10x + 4y = 219 - 11y = - 148. 5 y = 13. 5 2x + 3(13. 5) = 73. 50 2x + 40. 5 = 73. 5 2x = 73. 5 - 40. 5 2x = 33 x = 16. 5.

Mejor respuesta

Lakiukis17
8

2x + 3y = 73.

50

5x + 2y = 109.

50

(2x + 3y = 73.

5) - 5

(5x + 2y = 109.

5) 2 - 10x - 15y = - 367.

5

10x + 4y = 219 - 11y = - 148.

5

y = 13.

5

2x + 3(13.

5) = 73.

50

2x + 40.

5 = 73.

5

2x = 73.

5 - 40.

5

2x = 33

x = 16.

5.