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Elis [28]
3 years ago
12

Solve the system using elimination: Help me please12x - 8y = -12 6x + 4y = -30

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
4 0

12x - 8y = -12  

6x + 4y = -30

Multiply the 2nd equation by 2, to make the Y coefficients opposite:

6x + 4y = -30 x 2 = 12x + 8y = -60

Now add the two equations:

12x -8y = -12 + 12x +8y = -60

=  24x = -72

Divide bothe sides by 24 to solve for x:

x = -72/24

x = -3

Now replace x with -3 in the first equation to solve for y:

12(-3) - 8y = -12

-36 - 8y = -12

Add 36 to each side:

-8y = 24

Divide both sides by -8 to solve for y:

y = 24 / -8

y = -3

X = -3 and y = -3

(-3,-3)

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Answer:

Total amount Omar earn = $120

Step-by-step explanation:

Given:

Total amount Omar, Hala and Lujain got paid = $240

Ratio of money Omar, Hala and Lujain got paid = 5:9:10

Find:

Total amount Omar earn

Computation:

Total amount Omar earn = [Total amount Omar, Hala and Lujain got paid][Omar'ratio / Total ratio]

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Total amount Omar earn = [240][5 / (24)]

Total amount Omar earn = [24][5]

Total amount Omar earn = $120

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3 years ago
5 (2x – 1) –7 = 2 (x – 3)
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Answer:

x−3=x−3

Step-by-step explanation:

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Divide each term by 2 and simplify.

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Cancel the common factor of 2

Cancel the common factor=10/2

Divide x by 1=x=10/2

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List all of the solutions.

5=

(2x−1)−7=2=x=5

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