7x 9 =16 ⇒ 7x 9 +9=16+9 [Adding 9 both sides] ⇒ 7x =25 ⇒7x/7=25/7 [Dividing both sides by 7] ⇒ x=25/7 ...

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Variables and Expressions

Question 97x ...

Question

Question 9
7x -9 =16

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Solution

$7 x - 9 = 16$
$\Rightarrow 7 x - 9 + 9 = 16 + 9$ [Adding 9 both sides]
$\Rightarrow 7 x = 25$
$\Rightarrow \frac{7 x}{7} = \frac{25}{7}$ [Dividing both sides by 7]
$\Rightarrow x = \frac{25}{7}$

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