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Novosadov [1.4K]
3 years ago
15

12 x − 8 y = 24 6 x − y = 21

Mathematics
1 answer:
KATRIN_1 [288]3 years ago
5 0

Answer: x=4

              y=3

Step-by-step explanation:

12x-8y=24

6x-y=21

---------------------

y=6x-21

12x-8(6x-21)=24

12x-48x+168=24

-36x=-144

x=144/36

x=4

y=24-21

y=3

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3 years ago
Solving Rational equations. LCD method. Show work. Image attached.
Dmitry [639]

Answer:

b=1

Step-by-step explanation:

The given rational equation is

\frac{2b-5}{b-2} -2=\frac{3}{b+2}

The Least Common Denominator is (b+2)(b-2).

Multiply each term in the equation by the LCD.

(b+2)(b-2)\times \frac{2b-5}{b-2} -(b+2)(b-2)\times2=(b+2)(b-2)\times\frac{3}{b+2}

Simplify;

(b+2)\times \frac{2b-5}{1} -2(b+2)(b-2)=(b-2)\times\frac{3}{1}

(b+2)(2b-5) -2(b+2)(b-2)=3(b-2)

Expand and group similar terms

2b^2-5b+4b-10 -2(b^2-4)=3b-6

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3 0
3 years ago
3x + 5 = x - 3
dusya [7]

Answer:

x = -4

Step-by-step explanation:

3x + 5 = x - 3

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3x+5-x = x-3-x

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2x+5-5 = -3-5

2x = -8

Divide each side by 2

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7 0
3 years ago
Read 2 more answers
Sec^2 (pi/2 - x) * [sin^2 (x) - sin^4 (x)]
Bad White [126]

Answer:

Explanation:

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=cot2x

4 0
3 years ago
-18-12+(24/-8)-2(-15+10)
tigry1 [53]

Answer:

-17

Step-by-step explanation:

-18-12+(24/-8)-2(-15+10)

-18-12(-3)-2(-5)

-18-9-2(-5)

-27-2(-5)

-27+10

-17

I hope this helps! Please mark as brainliest! :D Good Luck! :)

3 0
3 years ago
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