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ElenaW [278]
1 year ago
10

Sistema de ecuaciones.5x+2y=-152x-2y=-6

Mathematics
1 answer:
Zolol [24]1 year ago
7 0

Tnemos el sisema de ecuaciones:

\begin{gathered} 5x+2y=-15 \\ 2x-2y=-6 \end{gathered}

Podemos resolverlo por eliminación sumando ambas ecuaciones y eliminando y. Asi podemos resolver para x:

\begin{gathered} (5x+2y)+(2x-2y)=(-15)+(-6) \\ 7x+0y=-21 \\ x=-\frac{21}{7} \\ x=-3 \end{gathered}

Ahora podemos resolver para y con cualquiera de las dos ecuaciones:

\begin{gathered} 2x-2y=-6 \\ 2\cdot(-3)-2y=-6 \\ -6-2y=-6 \\ -2y=-6+6 \\ -2y=0 \\ y=0 \end{gathered}

Respuesta: x=-3, y=0

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Answer:

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Step-by-step explanation:

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6 0
3 years ago
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3 years ago
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Step-by-step explanation:

Step 1

cost of cheese pizza  =$11

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let number cheese pizza be represented as c

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Step 2 Solving

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By elimination method, Multiply equation 1 by 11 and subtract the new equation from equation 2

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