Question

Find the value of the variable in the expression ,n/2- 3n/4+5n/6 =21​

Answer 1

Answer:

ok see the picture it will help you

totally the value of n=36

Step-by-step explanation:

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Answer 2

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$\: \: \bigstar \large \green{ \bold{ \underline{ \underline{answer : }}}}$

$\: \: \large \orange{ \bold{ \underline{given \: equations}}}$

$\: \: \: \ggg \displaystyle\bf{ \frac{n}{2} - \frac{3n}{4} + \frac{5n}{6} = 21}$

$\: \bullet \large \red{ \bold{ \underline{step \: by \: step \: explaination}}}$

$\: \implies \displaystyle \sf{ \frac{n}{4} - \frac{3n}{4} + \frac{5n}{6} = 21 }$

$\: \: \implies \displaystyle \sf{ \frac{ - 2n}{4} + \frac{5n}{6} = 21}$

$\: \: \implies \displaystyle \sf{ \cancel \frac{ - 2n}{4} + \frac{5n}{6} = 21}$

$\: \: \implies \displaystyle \sf{ \frac{ - n}{2} + \frac{5n}{6} = 21}$

$\: \: \implies \displaystyle \sf{ \frac{ - n \times 3}{2 \times 3} + \frac{5n}{6} = 21}$

$\: \: \implies \displaystyle \sf{ \frac{ - 3n}{6} + \frac{5n}{6} = 21}$

$\: \: \implies \displaystyle \sf{ \frac{2n}{6} = 21}$

$\: \: \implies \displaystyle \sf{n = \frac{6 \times 21}{2} }$

$\: \: \implies \displaystyle \sf{n = 3 \times 21}$

$\: \: \implies \displaystyle \sf{n = 63}$

$\: \: \bigstar \blue{ \bold{ \underline{the \: answer \: will \: be \: n = 63}}}$