Question

7. Find a number twice whose value is equal to 15 more than half its value.???????​

Answer 1

Answer :

❍ 10

Explanation :

According to the question :

☃️ Let the number be ' n '

❄ Twice number = 2n

❄ Half it's value = n / 2

Equation :

=> 2n = 15 + n / 2 [ LCM = 2 ]

=> 2n = ( 15 × 2 ) + n / 2

=> 2n = 30 + n / 2

=> 2n + n = 30 + n

=> 4n = 30 + n

=> 4n - n = 30

=> 3n = 30

=> n = 30 / 3

=> n = 10

❥ So, It's Done ❥ !!

‏‏‎ ‎

Answer 2

${ \sf{ \underline{ \red{ \underline{Question}}}} : - }$

• Find a number twice whose value is equal to 15 more than half its value.?

${ \sf{ \underline{ \red{ \underline{Solution}}}} : - }$

{ According to question}

${ \sf{ \purple{let, \: that \: number \: be \: \: }}x}$

${ \bf {\underline{ \red{now }}}}$

• Number twice whose value is equal to 15 more than half its value.

Hence

${ \sf{ \purple{ \dashrightarrow} {2x =15 \: + \: \frac{x}{2} }}}$

${ \sf{ \purple{ \dashrightarrow} {2x \: - \frac{x}{2} =15 }}}$

${ \sf{ \purple{ \dashrightarrow} { \frac{2x \: \times \: 2}{2} \: - \frac{x}{2} =15 }}}$

${ \sf{ \purple{ \dashrightarrow} { \frac{4x}{2} - \frac{x}{2} =15 }}}$

${ \sf{ \purple{ \dashrightarrow} { \frac{4x \: - \: x}{2} =15 }}}$

${ \sf{ \purple{ \dashrightarrow} { \frac{3x}{2} =15 }}}$

${ \sf{ \purple{ \dashrightarrow} {3x =15 \times 2 }}}$

${ \sf{ \purple{ \dashrightarrow} {3x = 30 }}}$

${ \sf{ \purple{ \dashrightarrow} {x = \frac{30}{3} }}}$

${ \sf{ \purple{ \dashrightarrow} {x = 10 }}}$

${ \bf{ \underline{Hence, number \: is \: { \red{10} \: .} }}}$