corianrigby97
17.11.2019 •
Mathematics
El día del estreno de una película se vendieron 600 entradas y se recaudaron 196 250 soles. si los adultos pagaban 400 soles. y los niños 150 soles. ¿cuantos niños y adultos hay?
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Ответ:
Por medio de sistema de ecuaciones:
*adultos (a) = $400
*niños (b) = $150
total de entradas : a + b = 600 ecua 1
dinero recaudado:
400a + 150b = 196 250 ecua 2
operamos:
a + b = 600 ecua 1
400a + 150b = 196 250 ecua 2
(-150) a + b = 600
400a + 150b = 196 250
- 150a - 150b = -90 000
400a + 150b = 196 250
250a = 106 250
a = 106 250/250
a = 425 adultos
a + b = 600
425+b =600
b = 600-425
b = 175 niños
comprobacion:
400a + 150b = 196 250
400(425)+150(175)=196 250
170 000 + 26 250 = 196 250
196 250 = 196 250
si tienes dudas pregunta
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Ответ:
It is given that: x + y = -7
2x + 70 = 6
2x = 6 - 70
x = -64/2
x = -32
Substitute it in first equation:
-32 + y = -7
y = -7 + 32
y = 25
In short, Your Numbers are: -32 and 25
Hope this helps!