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const2013 [10]
3 years ago
8

6x + 3y = 12 6x - 5y = 60

Mathematics
2 answers:
erma4kov [3.2K]3 years ago
5 0
6x + 3y = 12\\
6x - 5y = 60\\\\
6x + 3y = 12\\
-6x + 5y = -60\\
--------\\
8y=-48\\
y=-6\\\\
6x+3\cdot(-6)=12\\
6x-18=12\\
6x=30\\
x=5


brilliants [131]3 years ago
4 0
6x+3y=12. so... 6x=12-3y.

6x-5y=60, so... 6x=60+5y

As 6x=6x

12-3y=60+5y

12-60=8y

8y=-48

So y=-48/8=-6

When y=-6,

6x-5(-6)=60

6x+30=60

6x=30

Therefore x=5.

So x=5 and y=-6.
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Hay tres paralelos para el curso de cálculo diferencial y tres paralelos para algebra lineal. Un estudiante desea tomar ambos cu
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mi español no es tan bueno si hay algún error en esto entonces lo siento

cursos en diferencial = a, b, c

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7 0
3 years ago
The number of employees for a certain company has been decreasing each year by 7​%. If the company currently has 790 employees a
Vikki [24]

Answer:

The number of employees in 8 years  is  442

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Given:

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The number of employees after 8 years is this same rate continues =?

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Let the number of employees after 8 years be x

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since the decrase rate is 7% we use 0.07

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6 0
2 years ago
What is 90times345 need it now
Ivanshal [37]
90*345=
31050
Hope i helped.
6 0
3 years ago
Read 2 more answers
5x -10x- 30= 10x solve for x
Andru [333]

Answer:

x=-2

Step-by-step explanation:

5x -10x- 30= 10x

-5x -30 = 10x

-30=15x

x=-2

8 0
3 years ago
Read 2 more answers
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