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
azamat
2 years ago
5

(3x + 5y = 7 { 4x - y = 5

Mathematics
1 answer:
dalvyx [7]2 years ago
5 0

Answer:

Step-by-step explanation:

Solution by substitution method

3x+5y=7

and 4x-y=5

Suppose,

3x+5y=7→(1)

and 4x-y=5→(2)

Taking equation (2), we have

4x-y=5

⇒y=4x-5→(3)

Putting y=4x-5 in equation (1), we get

3x+5y=7

⇒3x+5(4x-5)=7

⇒3x+20x-25=7

⇒23x-25=7

⇒23x=7+25

⇒23x=32

⇒x=32/23

→(4)

Now, Putting x=32/23

in equation (3), we get

y=4x-5

⇒y=4(32/23)-5

⇒y=(128-115)/23

⇒y=13/23

∴y=13/23   and x=32/23

You might be interested in
Subtract 6 from z, then multiply 3 by the result
Helen [10]

Answer:

3(z-6)

Step-by-step explanation:

First Subtract 6 from z,

=> z - 6

then multiply by 3,

=>3(z-6)

6 0
2 years ago
Read 2 more answers
A bottle of apple juice cost $.89 what is the total cost of 5 cartons of apple juice if there are 12 bottles in each carton
stiks02 [169]
12 x .89 = 10.68
10.68 x 5= $53.40
answer is $53.40
3 0
2 years ago
7. Which of the following is an example of a
Klio2033 [76]
By looking at the answer a is eliminated by default since it is not between 6 and 7 which also eliminates e. now you’re left with b and c and you have to remember the definition of an irrational number (in short, it’s a number that never ends) which would leave you with c
3 0
3 years ago
Read 2 more answers
Which of the following statements are true about the triangles?
Arisa [49]
Show the triangle in the picture
4 0
2 years ago
PLEASE HELP I WILL GIVE BRAINLIEST!!!!! I already solved for x please solve for y and z! Trolls are getting reported and banned
hoa [83]
Not sure if your the same person but I had already done the work for this problem....

4 0
2 years ago
Other questions:
  • What is 15 percent of 92?
    14·1 answer
  • Need some help with this one
    5·1 answer
  • 3y+4=-8 what does y equal?
    12·2 answers
  • What is 20/36 reduced
    12·2 answers
  • There are 32 student,nine of those are women,what percent are men,round to the nearest tenth?
    7·1 answer
  • Help please I give thanks
    10·1 answer
  • Consider the function p(c)=2^c+1 . What is p(3)?
    7·1 answer
  • I need help im gonna post 3 more different questions pls answer them.
    9·2 answers
  • The exchange rate in london is £1 = 1.14 euros
    9·1 answer
  • Solving Equations with the Variable on Each Side
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!