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Solution of an Algebraic Equation

If 3 + 2x = 9...

Question

If $3 + 2 x = 9,$ then $x =$

A

1

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B

2

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C

3

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D

4

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Solution

The correct option is C 3
Given: An algebraic equation is $3 + 2 x = 9$

$Let's solve for x : - ---------------- -$
$3 + 2 x = 9$
Subtract 3 from both the sides
$3 + 2 x - 3 = 9 - 3$
$2 x = 6 (∵ 3 - 3 = 0; 9 - 3 = 6)$
Divide by 2 on both the sides
$\frac{2 x}{2} = \frac{6}{2}$
$x = 3$

$∴ The value of x = 3$

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Similar questions

| x - 3 | < 2 x + 9

x

lies in the interval

3^{2 x} + 9 = 10 (3^{x})

, then the value of

x^{2} + 1

\frac{2 x + A}{(x - 3) (x + 2)} = \frac{9}{5 (x - 3)} + \frac{B}{(x + 2)}

| 2 x + 3 | \leq 9

2 x + 3 < 0

9^{x - 1} = 3^{2 x - 1} - 486

,then the value of x is:

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