Question

if (3-1) is a solution of equation 3x+7y =m, then equals
1) 4
2) 3
3) 2
4) 1

Answer 1

$Given \: (3,-1) \: is \: a \: solution \: of$

$equation\: 3x + 7y = m$

$Put \: x = 3 \:and \: y = -1 \: in \: the \: equation,$

$we \:get$

$\implies 3 \times 3 + 7 \times (-1) = m$

$\implies 9 - 7 = m$

$\implies 2 = m$

$\therefore \red{Value \:of \: m } \green { = 2 }$

$Option \: \pink{ ( 3 ) } \: is \: correct .$

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