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Elena-2011 [213]
3 years ago
5

5x-2y=5 2x+3y=21 How do I find x&y??? Please answer asap!!!!

Mathematics
2 answers:
Lubov Fominskaja [6]3 years ago
7 0
5x-2y=5 + 2x+3y=21
7x=26
1y=26.
X= 3.71
Y= 26
Artist 52 [7]3 years ago
4 0
To solve systems of two equations with two variables (in this case, "x" and "y"), you choose one equation and attempt to solve for one of the variables.

For example, I will try solving for x using the first equation.
5x - 2y = 5
5x = 5 + 2y        [move 2y to other side]
x = (5 + 2y) / 5  [divide both sides by 5]
x = 1 + (.4)y      [simplified form]

Now, I plug this value into the x of the second equation to solve for y.

2x + 3y = 21
2 * (1 + (.4y)) + 3y = 21  [plug in x]
2 + (.8)y + 3y = 21          [distribute 2 to the x value we plugged in]
2 + 3.8y = 21                   [add the y terms together]
3.8y = 19                        [subtract 2]
y = 5                               [divide by 5]

Now that we know the value of y, plug it into either of the original equations to find x. I'll plug it into the first one.
5x - 2y = 5 
5x - 2(5) = 5 [plug in y]
5x - 10 = 5    [2 * 5]
5x = 15         [add 10]
x = 3             [divide by 5]

The final answer is x = 3, y = 5.

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How is this number read? 14.102
qwelly [4]

Answer:

fourteen and one-hundred-two

Step-by-step explanation:

we tend to read "." as "point" but the proper reading would be to read the number left to the decimal point (14), add the word "and" and then read the number to the right of the decimal point (102)

5 0
2 years ago
Can you guys help me solve this problem
Maslowich

PLEASE. MARK ME AS BRAINLIEST ANSWER.

8 0
2 years ago
Plzzz help need it right nowww.....
Hunter-Best [27]
2x-5= - 20 


2x=-20+5
 
          Add  \ 5 \ to \ both \ sides
 

2x=-15

 
 

x=- \dfrac{15}{2}       Divide \ both \ sides \ by \ 2
5 0
3 years ago
alex purchased 20,000 for a new car. The cars value depreciates 7.25% each year. What will be the value of the car five years af
Ugo [173]
The answer would be 18550$. you would find 7.25% of 20000, multiply it by 5, then subtract it from 20000 to get 18550$.
8 0
3 years ago
Nina had 9 apples to share with 5 of her friends. If all 6 people get equal share , how many apples will each person get? How do
Umnica [9.8K]
<span> Nina + her 5 friends = 6 people
Then she has 9 apple to share with her and her friends.
Let’s calculate how many apple will each people get when they equally divide it with each other:
=> 9 – 6 = 3
Thus already have 1 apple each, now, let’s divide the remaining 3 apples
=> 3 / 6 = .5
So they have half of apple each. Let’s add
=> 1 + .5 = 1.5
Each person will get 1.5 apple.
=> 1.5 * 6 = 9</span>



7 0
3 years ago
Read 2 more answers
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