Question Details

Find the value of x and y for the given system of equations : 3x+2y=6,5x+y=2

Options

A

x=2/7, y=24/7

B

x=-(2/7), y=-(24/7)

C

x=-(2/7), y=24/7

D

x=2/7, y=-(24/7)

Correct Answer :

x=-(2/7), y=24/7

Solution :

The correct option is x=-(2/7), y=24/7.

To find the values of x and y that satisfy the given system of linear equations, we can use the method of substitution. Let's write down the given equations:

3 x + 2 y = 6

and

5 x + y = 2

First, we can express y in terms of x using the second equation by subtracting 5x from both sides:

y = 2 5 x

Next, we substitute this expression for y into the first equation:

3 x + 2 ( 2 5 x ) = 6

Now, we distribute the 2 to simplify the equation:

3 x + 4 10 x = 6

Combine the like terms containing x:

7 x + 4 = 6

Subtract 4 from both sides of the equation to isolate the term with x:

7 x = 6 4

7 x = 2

Divide both sides by 7 to find x:

x = 2 7

To find the corresponding value of y, substitute the value of x back into our expression for y:

y = 2 5 2 7

Simplify the multiplication:

y = 2 + 10 7

Convert 2 to a fraction with a denominator of 7 to add the terms:

y = 14 7 + 10 7

y = 24 7

Thus, the final values are x=27 and y=247.

Unlock Our Free Library

Access expert-curated educational resources and study materials—completely free.

Discover more resources

You may also like

Mock Tests

View All
  • JEE
  • intermediate
  • 3 hours
  • chemistry, mathematics, physics

  • JEE
  • intermediate
  • 3 hours
  • chemical engineering, mathematics, physics