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Anna007 [38]
3 years ago
12

What is the answer of x and y-4x+y= -1

Mathematics
1 answer:
Len [333]3 years ago
8 0

Answer: x= 1/4 + 1/2y

Step-by-step explanation:

y-4x + y= -1

2y - 4x= -1

-4x= -1 - 2y

x= 1/4 + 1/2y

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Does anyone know how he got from step 1 to step 2??????????
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9514 1404 393

Explanation:

Both sides of the equation are squared.

  \dfrac{x-12}{4}=\sqrt{x} \qquad\text{given}\\\\ \left(\dfrac{x-12}{4}\right)^2=x \qquad\text{square both sides}\\\\ \left(\dfrac{x}{4}-3\right)^2=x \qquad\text{divide out the fraction}\\\\ \dfrac{x^2}{4^2}-\dfrac{6}{4}x+9=x \qquad\text{$(a-b)^2=a^2-2ab+b^2$}\\\\\dfrac{x^2}{16}-\dfrac{5x}{2}+9=0 \qquad\text{subtract $x$}

I like this better without fractions, so would multiply by 16 at this point (or earlier).

  x^2 -40x +144 = 0

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The solution is x = 36.

3 0
3 years ago
What is 8y=23+3x divided by 8?
arsen [322]
8y = 23 + 3x divided by 8: divide ALL numbers by 8
8y/8 is y
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Therefore, the answer would be;
y = 23/8 + 3/8x, which is the same as y = 3/8x + 23/8
6 0
3 years ago
Solve: 8 – 2x = 2<br> x=<br><br> And how?
TiliK225 [7]

Answer:

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Step-by-step explanation:

8 - 2x = 2

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5 0
4 years ago
Read 2 more answers
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Orlov [11]
Answer x^2-6x-8=0


I hope this helps

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