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Nat2105 [25]
2 years ago
10

Ellason wants to solve the following system using the elimination method: 5x + 2y = 30 x + y = 8 What number should the equation

x + y = 8 be multiplied by to eliminate y?
2, −2, 5, −5
Mathematics
2 answers:
Zinaida [17]2 years ago
8 0
 - 2 because we obtain : - 2x - 2y = - 16 ;
We solve the system:
5x + 2y = 30
-2x - 2y = -16
_____________(+)
3x /       = 14;
x = 14/3;
y = 8 - 14/3;
y = 24/3 -14/3;
y = 10/3;

The solution of the system is ( 14/3 ; 10/3 )

maxonik [38]2 years ago
7 0
-2.
5x + 2y = 30
-2x- 2y = 16
3x = 14
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Step-by-step explanation:

Supongamos que el empresario tiene N trabajadores, y tiene la cantidad de dinero D para pagarles cada día.

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Esto se puede reescribir como:

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También sabemos que si pagara 45 a cada empleado, le sobraría 60.

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Entonces tenemos dos ecuaciones:

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Para resolver esto, el primer paso es aislar una de las variables en una de las ecuaciones, en este caso aislaré D en la segunda ecuación.

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Ahora podemos reemplazar esto en la primer ecuación y resolver para N

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Step-by-step explanation:

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