Question

$3x + 4y = 7$
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Answer 1

$if \: we \: want \: to \: find \: the \: value \: of \: x \: . \\ then = > \\ 3x + 4y = 7 \\ = > 3x = 7 - 4y \\ = > x = \frac{7 - 4y}{3} \\ \\ \\ \\ if \: we \: want \: to \: find \: the \: value \: of \: y. \\ then. = > \\ \\ 3x + 4y = 7 \\ = > 4y = 7 - 3x \\ = > y = \frac{7 - 3x}{4}$

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Answer 2

Explanation:

$3x + 4y = 7 \\ 3x + 4y - 7 = 0$