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

Question

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

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Eloise 1 month 2021-08-22T23:00:37+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-22T23:02:12+00:00

    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 ❥ !!

    ‏‏‎ ‎

    0
    2021-08-22T23:02:21+00:00

    {  \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} \:  .} }}}

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