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Verdich [7]
3 years ago
8

Solve the system with elimination. x - 2y = 4 3x + y = 6 ? ]

Mathematics
2 answers:
FrozenT [24]3 years ago
8 0
X = 16/7, y = -6/7

For elimination I will multiply the first equation by -3 to get the x to cancel

x - 2y = 4 --> -3x + 6y = -12

Now we bring back the other equation and treat it like an addition problem:

-3x + 6y = -12
3x + y = 6
+———————
7y = -6

y = -6/7

To get x we will use this y-value and plug it into one of the equations:

3x + y = 6,
3x + (-6/7) = 6
3x - 6/7 = 6
3x = 48/7
x = 16/7

So the solution is x = 16/7, y = -6/7, and if you are ever unsure you can put both of these values into both system of equations to see if the equations are true.
Anna71 [15]3 years ago
5 0
\bold{FULL ANSWER:}

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A laptop that is plugged up and turned off uses 0.001kw/hr of energy.  Each kwh of energy produces, on average, 1.39 lbs of CO2.  There are 24*7=168 hours in the week; subtract the 40 hour work week from this and we have 128 hours a week for 52 weeks a year:
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6 0
4 years ago
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faltersainse [42]
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7 0
3 years ago
Read 2 more answers
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The answer is 52,000.


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