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
barxatty [35]
3 years ago
10

If x-2y=0 and 3x + y =7 what is the value of x

Mathematics
1 answer:
Agata [3.3K]3 years ago
6 0

Answer:

x=2

Step-by-step explanation:

If 3x + y = 7, then y= 7 - 3x.

Substitute in x - 2y = 0

So:

x - 2(7-3x)=0

x-14+6x=0

7x=14

x=2

You might be interested in
Solve using quadratic equations
olasank [31]
4x² - 9x² + 5 = 0
4x² - 4x - 5x + 5 = 0
4x(x - 1) - 5(x - 1) = 0
(4x - 5)(x - 1) = 0

Set each binomial equal to zero. 

4x - 5 = 0
4x = 0 + 5
4x = 5
x = 5/4

x - 1 = 0
x = 0 + 1
x = 1

Your solutions are x = 1, 5/4
7 0
3 years ago
A jar contains 8 white marbles, 6 black marbles, and 1 red marbles. If one marble is drawn at random, find the probability that
Mariana [72]

Answer:

Hi there!

6/15 is the probability that the marble is black!

Step-by-step explanation:

Oki, so lets's find the total number of marbles first!

8 + 6 + 1 = 14 + 1 = 15

And just turn it into a fraction!(very simple and easy)

6/15

5 0
3 years ago
Read 2 more answers
How do I work the problem the ratio of Jane age to her daughter age is 9:2 the sum of their ages is 44... how old is jane
Artist 52 [7]

Answer:

Jane is 4years old......

6 0
3 years ago
Divide.<br> (4x² +17x+20) / (x+3)
prohojiy [21]

Step-by-step explanation:

try to see if this is what ur lookin for

3 0
3 years ago
I need help can you help me
patriot [66]

Answer:

2 : 3

Step-by-step explanation:

BRAINLIEST PLEASE

8 0
3 years ago
Read 2 more answers
Other questions:
  • a scuba diver is searcing for a lost peice of meatl in the ocean. if she starts at 25 feet below the surface and the descends at
    8·1 answer
  • This is so confusing pls help: 60 percent of 78 is the same as 65 percent of what number?
    12·1 answer
  • Jim deposited $350 into a savings account with simple interest at Hunting Bank. He left the money in his account with no changes
    10·1 answer
  • 3. Write an equation of a line that is perpendicular to the line x – 2y = 8.
    10·1 answer
  • A rectangle has a perimeter of 16p centimeters. It has a width of 2p centimeters. Find the length of the rectangle in terms of p
    10·2 answers
  • A cone has a radius of 5 and height of 6 Iowk need the answer asap please it's on khan academy!!​
    12·1 answer
  • A zoo-keeper has 9 gorillas and 12 monkeys. He wants to keep the ratio of gorillas to monkeys the same. If the zoo-keeper buys 3
    10·2 answers
  • having trouble with this problem, pls help :/ I know the answer, just not how to get there. (ap calc ab, integrals)
    15·1 answer
  • 2. A boy scored the given marks in various class-tests during a term, (each test being marked out of 20): 15, 17, 16, 16, 10, 12
    14·1 answer
  • Please awnser last question if correct we can do thisss
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!