Question

solue 2x+4y = 5 and 3x+4y=7
by Cross multiply method​

Answer 1

Answer:

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Step-by-step explanation:

$2x + 4y = 5 \\ 4y = 5 - 2x \\ y = \frac{5 - 2x}{4} \\ put \: the \: value \: of \: y \: in \: the \: equation \\ 3x + 4y = 7 \\ 3x + 4 \times \frac{5 - 2x}{ 4} = 7 \\ 3x + 5 - 2x = 7 \\ x + 5 = 7 \\ x = 7 - 5 \\ x = 2 \\ 2x + 4y = 5 \\ 2 \times 2 + 4y = 5 \\ 4 + 4y = 5 \\ 4y = 5 - 4 \\ 4y = 1 \\ y = \frac{1}{4}$

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