1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nata [24]
2 years ago
11

2x + y = 9 x = y - 3

Mathematics
2 answers:
deff fn [24]2 years ago
8 0

Answer:

<em>x = 2          y = 5</em>

Step-by-step explanation:

Since we know that

x = y - 3

We can insert that into the equation above:

2(y-3) + y = 9

After having this equation, we can start by multiplying the numbers/variables in the parenthesis by 2.

2y - 6 + y = 9

Then add the common multiples (2y and y)

That makes:

3y - 6 = 9

We need to get 3y on a side by itself, so to do this, we can add 6 to (-6) and (9)

That makes:

3y = 15

Divide the 3 by 3 and 15 to get the y on its own:

y = 5

Now we need to find x, and to do this we can insert y into the equation:

2x + 5 = 9

Now subtract the 5 from the (5) and (9) and you'll get

2x = 4

Then you divide the 2 on both sides and get

x = 2

You can check your work by inserting x and y into the equation

2(2) + 4 = 9  

Sorry for this super long explanation, and hope this helps

lawyer [7]2 years ago
3 0

Answer:

x=2 and y=5

Step-by-step explanation:

Steps:

I will solve your system by substitution.

x=y−3;2x+y=9

Step: Solve x = y − 3 for x:

Step: Substitute y − 3 for x in 2x + y = 9:

2x+y=9

2(y−3)+y=9

3y−6=9(Simplify both sides of the equation)

3y−6+6=9+6(Add 6 to both sides)

3y=15

3y/3=15/3  (Divide both sides by 3)

y=5

Step: Substitute 5 for y in x = y − 3 :

x=y−3

x=5−3

x=2(Simplify both sides of the equation)

Answer:

x=2 and y=5

You might be interested in
What is -87 + (-971)=
MrMuchimi

Answer:

-1058

Step-by-step explanation:

8 0
2 years ago
Which star has a similar surface temperature to our sun?
xenn [34]

Answer: I believe it is yellow star?

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Annie went on a shopping trip to Lexington. Is she purchasing handbag originally priced at $25 but discounted 20%. If sales tax
VikaD [51]

Answer:

$0.05

Step-by-step explanation:

5 0
3 years ago
Solve log x = 2.
Sever21 [200]

Answer:

If log x = 2

x = 100

Step-by-step explanation:

Logarithm always has a base and an index. It can be I many forms.

It can be in base 2, 3, 4, 5, and so on.

It is a property of logarithm that if

logarithm of 'a' to base 'b' equals 'x', we write:

log_b (a) = x

Then,

a = b^x.

Usually, when a logarithm is written without a base, it tells us that it is in base 10. Instead of writing a logarithm of x to base 10,we can just write 'log x', it is sufficient to say that it is in base 10.

It can also be in the form of the Napierian Logarithm, 'ln'.

'ln x' is logarithm to base 'e'.

if ln x = 5

Then

x = e^5.

So,

log x = 2

Means logarithm of 'x' to base 10 equals 2.

x = 10^2

= 100

x = 100

3 0
3 years ago
Evaluate the expression x<br> x(2 – 5y)²<br> when x= = -5 and y=-3.
Liula [17]

\displaystyle -5(2-5(-3))^2=-5(17)^2=-1445

4 0
3 years ago
Other questions:
  • Some one please help !!! How do I solve -1&lt;-x/3&lt;1
    8·1 answer
  • In an arithmetic​ sequence, the nth term an is given by the formula an=a1+(n−1)d​, where a1 is the first term and d is the commo
    10·1 answer
  • Can you trace this figure without
    11·1 answer
  • Find the distance between (-4, 5) and (4, 3)
    13·1 answer
  • Given sin θ = 7/25, find the value of a and b in the following statements.
    14·2 answers
  • This app is amazing! Please help I’m really confused!
    10·2 answers
  • Ursula tosses two six-sided number cubes and ADDS the numbers rolled. Which of these is a list of the outcomes of the two row? A
    10·1 answer
  • Tell two different ways to find the difference of 414 subtract 178
    10·1 answer
  • A number is a number such that the product of both numbers is 1, what is it called
    6·1 answer
  • Number six please help!
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!