Question

Solve The following equation by elimination
Method.
3х+4y , 3x-y = 9​

Answer 1

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Answer 2

SOLUTION

TO SOLVE

The following equation by Elimination Method

3х+4y = - 6 , 3x-y = 9

EVALUATION

Here the given system of equations are

$\sf{3x + 4y = - 6 \: \: \: \: - - - - (1)}$

$\sf{3x - y = 9 \: \: \: \: - - - - (2)}$

Multiplying equation 2 by 4 we get

$\sf{12x - 4y = 36 \: \: \: \: - - - - (3)}$

Equation 1 + Equation 3 gives

$\sf{15x = 30 \: \: \: \: }$

$\sf{ \implies \: x = 2 \: \: \: \: }$

From Equation 2 we get

$\sf{(3 \times 2) - y = 9}$

$\sf{ \implies \: 6 - y = 9}$

$\sf{ \implies \: - y = 9 - 6}$

$\sf{ \implies \: - y = 3}$

$\sf{ \implies \: y = - 3}$

FINAL ANSWER

Hence the required solution x = 2 , y = - 3

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