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3 years ago

6. Solve the following system of equations

Mathematics

2 answers:

Setler79 [48]3 years ago

3 0

The answer is A. you basically just plug the numbers in and see which one is correct.

JulijaS [17]3 years ago

3 0

Answer:

A, x=-1, y=4

Step-by-step explanation:

First off you have to get rid of the y, so you have to multiply the the whole first equation by 5, and the whole second equation by 3, and then you can add your ys together and get 0 and you want to add both of the equations together. it will leave you with 34x=-34 so x=-1. take the first equation and plug in the answer you got, so it should be -5+3y=7, add 5 to both sides and then you will get 3y=12 divide that by 3 and you have y=4. So the answer is x=-1, y=4

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spayn [35]

At the bank, Derek made 7 withdrawals, each in the same amount. His brother, John, made 5 withdrawls, each in the same amount.

Let x be the amount of one of Derek's withdrawals

Each of John's withdrawals was $5 more than each withdrawal that Derek made.

x + 5 is t the amount of one of John's withdrawals

Derek made 7 withdrawals

So amount withdraw 7 times = 7x

John made 5 withdrawals

So amount withdraw 5 times = 5(x+5)

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(A) 7x = 5(x+5)

(B) Solve for x

7x = 5x + 25

Subtract 5x from both sides

2x = 25

Divide by 2

x = 12.5

we plug in 12.5 for x in 7x= 5x + 25

7(12.5) = 5(12.5) + 25

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87.5 = 87.5

(D) Each brother withdrawal 87.5 dollars

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marin [14]

Answer:

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polet [3.4K]

Answer:

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Step-by-step explanation:

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