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Solving a Quadratic Equation by Completion of Squares Method

Solve for x...

Question

Solve for $x$ :
$3 (x + 1) + 4 x = 24$

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Solution

Given,
$3 (x + 1) + 4 x = 24$
or, $7 x + 3 = 24$
or, $7 x = 21$
or, $x = 3$ .

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