Question

For drawing the graph of 4 x + 5 y is equal to 19 if x is equal to 1 what is the value of y

Answer 1

Answer:

$\begin{lgathered}Given \: Linear\: equation \:in \:two \\variables \: x \:and \:y \:is \: 4x + 5y = 19\end{lgathered}$$

$$Substitute \: x = 1 \: in \:the \: equation, \: we\:get$$

$$\implies 4\times 1 + 5y = 19$$

$$\implies 4 + 5y = 19$$

$$\implies 5y = 19 - 4$$

$$\implies 5y = 15$$

$$\implies y = \frac{15}{5} = 3$$

Therefore.,

$$If \: x = 1 \: then \: y = 3$$

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