2 years ago

X - 7 = 5x - 21

2 answers:

5 0

The answer is 7/2 but in decimal form that would be 3.5
I got that by simplifying both sides of your equation and from there I just isolated the variable.

kobusy [5.1K]2 years ago

4 0

I agree with the first person answer too and it’s true what he said

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3 years ago

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a_sh-v [17]

Answer:

.6315 or 63.15%

Step-by-step explanation:

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matrenka [14]

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Nadya [2.5K]

Answer:

$\pm \sqrt{13}$

Step-by-step explanation:

$\bigg(a + \frac{1}{a} \bigg)^{2} = {a}^{2} + \frac{1}{ {a}^{2} } + 2 \times a \times \frac{1}{a} \\ \\ \bigg(a + \frac{1}{a} \bigg)^{2} = 11 + 2 \\ \\ \bigg(a + \frac{1}{a} \bigg)^{2} = 13 \\ \\ \bigg(a + \frac{1}{a} \bigg) = \pm \sqrt{13}$

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2 years ago

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