Question

give me ans
$y = \frac{x}{2} and \: 3x + 4y = 20hoy \: to \: x = ...........$
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Answer 1

Answer:

x=4

Step-by-step explanation:

$y = \frac{x}{2} \: and \: 3x + 4y = 20 \\ replace \: y \: in \: the \: equation \\ 3x + 4 \frac{x}{2} = 20 \\ 3x + 2x = 20 \\ 5x = 20 \\ x = \frac{20}{5} \\ x =4$

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