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alexdok [17]
2 years ago
12

3⋅ (3⁴) = 3x= What does x equal to?

Mathematics
1 answer:
sergeinik [125]2 years ago
6 0
X=27
81 = 3x= 27
So x means 27
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Solve this system of linear equations. Separate the x- and y-values with a comma. -7x + 2y = -8 -16x + 9y = 26
Goryan [66]
(4,10). 
1. There are three ways to solve this: elimination, substitution, graphing.
2. I chose elimination, so I had to get one negative variable and one positive variable of the same value (for example, 18 and -18)

-7x+2y=-8
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I chose to get 2y and 9y to equal -18y and 18y. 
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63x-18y=72
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the 18s cross each other out. So you're left with
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Plug your answer for x into one of the equations. Let's use the first one.
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2y=20, divide both sides by 2.
y=10. 
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8 0
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