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Iteru [2.4K]
4 years ago
8

Find x, if 3x − 5(y + x ) ^2 = 16 and 4x + 2(y + x )^ 2 = 30

Mathematics
1 answer:
Lisa [10]4 years ago
3 0

Answer:

x is 7

Step-by-step explanation:

3x - 5(y + x)^2 = 16

3x - 16 = 5(y + x)^2

(y + x)^2 = 1/5(3x - 16) ------ eqn(I)

4x + 2(y + x)^2 = 30

2(y + x)^2 = 30 - 4x

(y + x)^2 = 1/2(30 - 4x) ------- eqn(II)

Equate eqn (I) & (II)

1/5(3x - 16) = 1/2(30 - 4x)

Multiply both sides by 10

2(3x - 16) = 5(30 - 4x)

6x - 32 = 150 - 20x

6x + 20x = 150 + 32

26x = 182

x = 182/26 = 7

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7 0
3 years ago
Alright, Since my previous questions have not been answered, here's 50p to whoever solves this
BigorU [14]

Step-by-step explanation:

We can make 2 equations as follows:

2x = y + 16 and x + 2y = 18

x + 2y = 18 is the same as x = 18 - 2y. Hence, 2(18 - 2y) = 2x = y + 16.

2(18 - 2y) = y + 16

36 - 4y = y + 16

5y = 20

y = 4.

6 0
3 years ago
-(5n-9)+3n=-2(5n-20)<br> what is n?
11Alexandr11 [23.1K]

Answer:

n=3.875

Step-by-step explanation:

First, we can expand the brackets:

-(5n-9)+3n=-2(5n-20) (given)

-5n+9+3n=-10n+40

-2n+9=-10n+40 (combine like-terms)

8n=31

n=3.875

Hope this helps :)

4 0
3 years ago
Read 2 more answers
Answer this question please
galben [10]
What do you want us to answer? there is no pic posted so we can't help u
4 0
4 years ago
Darren uses a family recipe to make hamburgers the recipe calls for 1/4 cup of breadcrumbs for every pound of hamburger if there
denis23 [38]

6 ²/₃

Step-by-step explanation:

The ration of breadcrumbs to Hamburger is;

¼ : 1

How about 1 ¹/₃ breadcrumbs : ? (x) hamburgers

We cross multiply the two;

1/4x = 1 ¹/₃ * 1

¼ x = 5/3

X  =  5/3 * 4

X = 20/3

X = 6 ²/₃

Learn More:

For more on extrapolating proportions check out;

brainly.com/question/11476035

brainly.com/question/11899092

brainly.com/question/254220

brainly.com/question/834661

#LearnWithBrainly

8 0
3 years ago
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