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Seventy concert tickets were sold for 550. each adult ticket cost 9 and each children's ticket cost 5. find the number of adult tickets and the number of childrens tickets sold.

(solve using linear equations)

Respuesta :

SaveTheFlock

Answer:

a = 50

c = 20

Step-by-step explanation:

Let a = adult tickets

Let c = child tickets
Equations:

9a + 5c = 550 ————> (1)

a + c = 70 ————> (2)

Solve for a using second equation

a = 70 - c

Plug in for a using first equation

9(70 - c) + 5c = 550

Solve for c

c = 20

Plug in for c using second equation

a + 20 = 70

a = 50


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yukivx
9x + 5y = 550
X + y = 70

X=50 and Y=20