Question

Solve the following pair of linear equation by cross multiplication method x + 2 y is equal to -1, 2 x + 3 y is equal to 12

Answer 1

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→ Answer:

x = 27 , y = -14

→ Step-by-step explanation:

$x+2y=-1\\\\=>2y=-1-x\\\\=>y=\frac{-1}{2}-\frac{x}{2} ...(1)$

$2x+3y=12$

sub. (1) in this eq. , we get ,

$2x+3(\frac{-1}{2}-\frac{x}{2})=12\\\\=>2x-\frac{3}{2} -\frac{3x}{2} =12\\\\=>\frac{x}{2}=\frac{27}{2}\\\\ =>x=27$

sub. this in (1) , we get ,

$y=-14$

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