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
zvonat [6]
3 years ago
6

Solve the system of equations. 2y+7x=−5 5y−7x=12 ​

Mathematics
1 answer:
3241004551 [841]3 years ago
4 0

We can solve this by substitution method.

Look at the second equation. If we rearrange to find 7x, we can substitute in the value into the first equation.

5y-7x=12

5y-7x-12=0

5y-12=7x

Therefore, 7x=5y-12

Now replace the 7x in the first equation with 5y - 12:

2y+7x=-5 (substitute in 7x = 5y - 12)

2y+(5y-12)=-5

7y-12=-5

7y=7

y=1

Now that we know y, we can find x by substituting in y = 1 into any equation we want. I will use the equation: 7x = 5y - 12

7x=5y-12 (substitute in y = 1)

7x=5(1) -12

5x=5-12

7x=-7

x=-1

__________________________________________________________

<u>Answer:</u>

<u></u>y=1\\x=-1<u></u>

You might be interested in
What is the alternating sum of digits
Morgarella [4.7K]

Answer:Take the alternating sum of the digits in the number, read from left to right. If that is divisible by 11, so is the original number. So, for instance, 2728 has alternating sum of digits 2 – 7 + 2 – 8 = -11. Since -11 is divisible by 11, so is 2728.

Hope this helped

6 0
3 years ago
Emily has 7 apples . she cuts each apple into 6 slices. how many slices does Emily have ? white an equation to show how you slov
Nezavi [6.7K]

If you multiply 7 by 6 you get 42

So 7•6=42

8 0
3 years ago
Read 2 more answers
All I need is help on these two so plz help me finish !!
aivan3 [116]

Answer:5.86 9.26

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What is the equation of the line in slope-intercept form?
inessss [21]

Answer:

y = x - 9

Step-by-step explanation:

the line has a slope of 1 so you do not have to include it in the equation and it crosses the y-axis at -9 so the y-intercept is -9

7 0
3 years ago
the population of the town is decreasing by 12% each year if the current population of the town is 13500, what will be the popul
Anit [1.1K]
Do 13,500 times .012. Take that answer and multiply it by 10. From that answer, subtract it from 13,500. That would be your final answer.
6 0
3 years ago
Other questions:
  • Elaine bought 3 4/5 pounds of apples for $1.99 per pound, 3/4 pound of pears for $2.25 per pound, and 3 2/3 pounds of bananas fo
    6·1 answer
  • Which equation is related to 58 = x + 25?
    9·2 answers
  • MARKNING BRAINLEST ! :) * The table shows a linear function, find the values of A , B , &amp; C. Show your work.
    8·1 answer
  • The relationship between women’s whole-number shoe sizes and foot length forms an arithmetic sequence, where an is the foot leng
    7·2 answers
  • MDCCCXXXV IN ROMAN NUMERALS
    14·2 answers
  • Dividing of Polynomials
    12·2 answers
  • Please Help Me With This Geometry Problem
    6·1 answer
  • What is the mean of the values below{48,59,70,27,61}
    13·2 answers
  • Emma recently purchased a new car she decided to keep track of how many gallons of gas they used on five other business trips th
    7·1 answer
  • Find the value of x..
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!