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Solution of an Algebraic Equation

If x + 5 = 12...

Question

If $x + 5 = 12,$ then $x =$

A

4

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B

5

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C

6

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D

7

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Solution

The correct option is D 7
Given: An algebraic equation is $x + 5 = 12$

$Let's solve for x : - ---------------- -$
$x + 5 = 12$
Subtract 5 from both the sides
$x + 5 - 5 = 12 - 5$
$x + 0 = 7 (∵ 5 - 5 = 0; 12 - 5 = 7)$
$x = 7$

$∴ The value of x = 7$

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Similar questions

(x + y) : (y + z) : (z + x) :: 5 : 11 : 12

\frac{x}{y} =

y = {tan}^{- 1} [\frac{5 cos x - 12 sin x}{12 cos x + 5 sin x}]

\frac{d y}{d x} =

| x - 3 | | x + 1 | = 12,

x =

5 cos x + 12 cos y = 13

, then the maximum value of

5 sin x + 12 sin y = ?

Q. If x + 12 = 12 + 7, then by commutativity of addition x =

(a) 12 (b) 7 (c) 19 (d) 5

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