Home
Class 10
MATHS
Solve for x and y : x+(y)/(4)=11," "...

Solve for x and y :

`x+(y)/(4)=11," "(5x)/(6)-(y)/(3)=7`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the system of equations given by: 1. \( x + \frac{y}{4} = 11 \) (Equation 1) 2. \( \frac{5x}{6} - \frac{y}{3} = 7 \) (Equation 2) We will use the elimination method. Let's go through the steps: ### Step 1: Eliminate a variable We will first eliminate \( y \) from the equations. To do this, we can manipulate the equations to have the same coefficient for \( y \). Multiply Equation 1 by 3 to make the coefficient of \( y \) in Equation 1 equal to that in Equation 2: \[ 3 \left( x + \frac{y}{4} \right) = 3 \cdot 11 \] This gives us: \[ 3x + \frac{3y}{4} = 33 \quad \text{(Equation 3)} \] ### Step 2: Rewrite Equation 2 Now we rewrite Equation 2 to have the same coefficient for \( y \): \[ \frac{5x}{6} - \frac{y}{3} = 7 \] Multiply Equation 2 by 4 to eliminate the fraction: \[ 4 \left( \frac{5x}{6} - \frac{y}{3} \right) = 4 \cdot 7 \] This gives us: \[ \frac{20x}{6} - \frac{4y}{3} = 28 \] To simplify, multiply through by 6 to eliminate the fractions: \[ 20x - 8y = 168 \quad \text{(Equation 4)} \] ### Step 3: Align the equations Now we have: - Equation 3: \( 3x + \frac{3y}{4} = 33 \) - Equation 4: \( 20x - 8y = 168 \) To eliminate \( y \), we can multiply Equation 3 by 8: \[ 8(3x + \frac{3y}{4}) = 8 \cdot 33 \] This gives us: \[ 24x + 6y = 264 \quad \text{(Equation 5)} \] ### Step 4: Solve the equations Now we have: - Equation 5: \( 24x + 6y = 264 \) - Equation 4: \( 20x - 8y = 168 \) We can now add Equation 4 and Equation 5 to eliminate \( y \): \[ (24x + 6y) + (20x - 8y) = 264 + 168 \] This simplifies to: \[ 44x - 2y = 432 \] ### Step 5: Solve for \( x \) Now, we can isolate \( x \): \[ 44x = 432 + 2y \] Now, let's substitute \( y \) back in from one of the earlier equations. From Equation 1, we can express \( y \): \[ y = 4(11 - x) \] Substituting this into the equation for \( x \): \[ 44x = 432 + 2(4(11 - x)) \] Simplifying gives: \[ 44x = 432 + 8(11 - x) \] \[ 44x = 432 + 88 - 8x \] Combining like terms: \[ 44x + 8x = 520 \] \[ 52x = 520 \] Dividing by 52 gives: \[ x = 10 \] ### Step 6: Solve for \( y \) Now substitute \( x = 10 \) back into Equation 1 to find \( y \): \[ 10 + \frac{y}{4} = 11 \] Subtracting 10 from both sides: \[ \frac{y}{4} = 1 \] Multiplying both sides by 4 gives: \[ y = 4 \] ### Final Answer Thus, the solution is: \[ x = 10, \quad y = 4 \]
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • SAMPLE PAPER 7

    EDUCART PUBLICATION|Exercise PART - B (SECTION - V) |8 Videos
  • SAMPLE PAPER 7

    EDUCART PUBLICATION|Exercise PART - B (SECTION - III) |16 Videos
  • SAMPLE PAPER 6

    EDUCART PUBLICATION|Exercise SECTION- C |10 Videos
  • SAMPLE PAPER 8

    EDUCART PUBLICATION|Exercise PART - B (SECTION - V)|4 Videos

Similar Questions

Explore conceptually related problems

Solve for x and y: 3x+2y=11 2x+3y=4

Solve for x and y: 4/x+5y=7,3/x+4y=5

Knowledge Check

  • Solve for x and y : ( 3x )/( 2) - ( 5y )/( 3) = - 2, ( x)/(3) + ( y)/(2) = (13)/(6)

    A
    `(3,2)`
    B
    `(2,3)`
    C
    `(2,4)`
    D
    `(4,2)`
  • Similar Questions

    Explore conceptually related problems

    Solve for x and y - 2x+3y=5 3x+4y=7

    Solve the following system of equations: (x)/(3)+(y)/(4)=11,quad (5x)/(6)-(y)/(3)=-7

    Solve for x and y: x-y=3 and x+2y=6 .

    Solve for x and y : 7x - 4y = 49, 5x - 6y=57

    Solve for x and y : 3x-2y=4 and 6x-4y=8

    Solve for x and y: 7x - 4y = 49 5x - y = 22

    solve for x and y - 2x+3y=7 3x-4y=2