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
alexandr1967 [171]
3 years ago
12

Solve the system of linear equations by substitution

Mathematics
2 answers:
elena-s [515]3 years ago
7 0
There is the equal values method, so you can do:

x-4 = 4x-10 (remove x from both sides)
-4 = 3x -10 (add ten to both sides)
6 = 3x  (devide by 3x)
2 = x

Check: (by plugging it into the equation)
y = 2-4 and y = 8-10
y = -2 and y = -2
that's matches so it is correct...
 YOUR ANSWER IS:
(2, -2)

I hoped I helped sort things out, and have a great day!
Anit [1.1K]3 years ago
5 0
Y = x-4
y = 4x-10

Compare both the equations, 
4x-10 = x-4
4x-x = 10-4
3x = 6
x = 6/3
x = 2

Now, substitute it in 1st equation, 
y = 2-4 = -2

In short, Your Answer would be (2, -2)

Hope this helps!
You might be interested in
A red chair falls from a 15ft tall building, how long has the blue phone been eating the titanic during the fall of rome?
andriy [413]

This took me a long time to analyze and answer. This answer is very intelectiual and scholarly. Here are the answers.

The red chair is blue titanic building phone rome.

3 0
2 years ago
Read 2 more answers
Can you help me with this its easy
Darina [25.2K]

Answer:

C. 1/8

Step-by-step explanation:

You gotta find the LCD and combine

4 0
3 years ago
Read 2 more answers
5x+20y=4<br> x=-4y+1<br><br> Solve for x/y
Andrews [41]

Hi there!


Looks like a lot of work is going on here.


Let's start by solving this equation for the x.


5x + 20y = 4


Step 1) Add -20y to both sides.


5x + 20y + - 20y = 4 - 20y 5x = -20y + 4


Step 2) Divide both sides by 5.


\frac{5x}{5}  = \frac{-20y + 4}{5}


x = -4y +  \frac{4}{5}


Final Answer:


x = -4y +  \frac{4}{5}


Now, let's solve for y.


Step 1) Add -5x to both sides.


5x + 20y + - 5x = 4 + - 5x 20y = -5x + 4


Step 2) Divide both sides by 20.


\frac{20y}{20} =  \frac{-5x + 4}{20}


y =  \frac{-1}{4} x +  \frac{1}{5}


Final Answer:


y =  \frac{-1}{4} x +  \frac{1}{5}


Hope this helps! :D


Hint - When you have two variables in an equation, and you want to solve for one, the other will end up in your answer. :)

6 0
3 years ago
Can you please help me!!
Molodets [167]
A is more because 1/4 is equal to 2/8 and 2/8 is less than 7/8 so you would have more than a minute
B is three minutes 2/8 goes into 7/8 three times
8 0
3 years ago
What is the equation of the line shown in the graph?
postnew [5]

The slope-intercept form:

y=mx+b

m - slope

b - y-intercept

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points (-3, 1) and (2, -4). Substitute:

m=\dfrac{-4-1}{2-(-3)}=\dfrac{-5}{5}=-1

Therefore we have the equation of a line

y=-1x+b\to y=-x+b

Put the coordinates of the point (-3, 1) to the equation:

1=-(-3)+b

1=3+b      <em>subtract 3 from both sides</em>

-2=b\to b=-2

<h3>Answer: y = -x - 2</h3>
4 0
3 years ago
Other questions:
  • a shopkeeper fixed the marked price of his television to make a profit of 40% . Allowing 20% discount on marked price the televi
    10·1 answer
  • Decimal equivalent 9 1/3
    8·2 answers
  • PL HELP ASAP
    12·2 answers
  • Hey can you please help me posted picture of question
    9·1 answer
  • Can someone help me pls 25 points
    6·2 answers
  • 5. You sell candy bars for a fundraiser. Each box contains 50 bars and costs $30. If you want to make $45 profit for each box, h
    10·2 answers
  • PLSSSSSSSSSSSS HELP LAST QUESTION
    5·2 answers
  • I will brainlist you Little help? Please?
    13·1 answer
  • Gemma and Leah are both jewelry makers. Gemma made 106 beaded necklaces. Leah made 39 more necklaces than Gemma.
    5·2 answers
  • What is the simple interest if I=1000 birr,T=5 years and p=4000 birr​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!