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If one equation of a pair of dependent l...

If one equation of a pair of dependent linear equations is -3x+5y-2=0. The second equation will be:

A

`-6x+10y-4=0`

B

`6x+10y-4=0`

C

`6x-10y-4=0`

D

`-6x+10y+=0`

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The correct Answer is:
To find the second equation of a pair of dependent linear equations given the first equation as \(-3x + 5y - 2 = 0\), we need to understand that dependent linear equations are essentially multiples of each other. ### Step-by-step Solution: 1. **Identify the coefficients of the given equation**: The given equation is \(-3x + 5y - 2 = 0\). - Coefficient of \(x\) (a1) = -3 - Coefficient of \(y\) (b1) = 5 - Constant term (c1) = -2 2. **Set up the relationship for dependent equations**: For two equations to be dependent, the ratios of their coefficients must be equal: \[ \frac{a1}{a2} = \frac{b1}{b2} = \frac{c1}{c2} = k \] Here, \(a2\), \(b2\), and \(c2\) are the coefficients of the second equation, and \(k\) is a constant. 3. **Express the coefficients of the second equation in terms of \(k\)**: - Let \(a2 = -3k\) - Let \(b2 = 5k\) - Let \(c2 = -2k\) 4. **Formulate the second equation**: The second equation can be formed as: \[ a2x + b2y + c2 = 0 \] Substituting the values: \[ -3kx + 5ky - 2k = 0 \] 5. **Choose a value for \(k\)**: To find a specific second equation, we can choose a value for \(k\). A common choice is \(k = 2\): \[ a2 = -3(2) = -6 \] \[ b2 = 5(2) = 10 \] \[ c2 = -2(2) = -4 \] 6. **Write the second equation**: Substituting these values back into the equation gives: \[ -6x + 10y - 4 = 0 \] ### Final Answer: The second equation of the pair of dependent linear equations is: \[ -6x + 10y - 4 = 0 \]
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