Find the value of 'b' if (2,7) is a solution of the equation 3x + by = 13.

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Solution

The correct option is A 1
if (2, 7) is a solution of the equation 3x + by = 13, then it will satisfy equation.

Substituting x = 2 and y = 7 in 3x + by = 13, we get
$⟹$ 3 $\times$ 2 + b $\times$ 7 = 13
$⟹$ 6 + 7b = 13
$⟹$ 7b = 7
$⟹$ b = 1

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