Question

(2) What is the value of x in the
equation 3x – 15 – 6 = 0 ?
O (A) 7
O (B) 8
O C9
O (D) -9​

Answer 1

$\huge{\underline{\color{purple}{\mathfrak{Answer:}}}}$

A) 7

3x - 15 - 6 = 0

3x - 21 = 0

3x = 21

x =$\dfrac{21}{3}$

x = 7

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Answer 2

ANSWER✔

$\large\underline\bold{GIVEN,}$

$\sf\dashrightarrow 3x-15-6=0$

$\large\underline\bold{TO\:FIND,}$

$\sf\dashrightarrow \text{ the value of x}$

$\large\underline\bold{SOLUTION,}$

$\sf\implies 3x-15-6=0$

$\sf\implies 3x-21=0$

$\sf\implies 3x=21$

$\sf\implies x= \dfrac{21}{3}$

$\sf\implies x= \cancel\dfrac{21}{3}$

$\sf\implies x= 7$

$\large{\boxed{\bf{ \star\:\: x= 7\:\: \star}}}$

VERIFICATION,

$\sf\therefore 3x-15-6=0$

$\sf\therefore x=7$

$\sf\implies 3(7)-15-6=0$

$\sf\implies 21-15-6=0$

$\sf\implies 6-6=0$

$\sf\implies 0=0$

$\sf\therefore R.H.S=L.H.S$

HENCE, THE VALUE OF X IS '7'

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