Question

(3) Twice a number added to five times the
same number gives eighty-four.​

Answer 1

$\huge\bf{Answer :}$

Hence, The Number is $</em></strong><strong><em>\</em></strong><strong><em>h</em></strong><strong><em>u</em></strong><strong><em>g</em></strong><strong><em>e</em></strong><strong><em>\</em></strong><strong><em>b</em></strong><strong><em>f</em></strong><strong><em>{</em></strong><strong><em>12</em></strong><strong><em>}</em></strong><strong><em>$

$\huge\bf{Explanation :}$

Let,

The Number Be x,

From Condition 1,

$2x + 5x = 84$

Solving Equation 1,

$2x + 5x = 84 \\ \: \: \: \: \: \: \: \: \: \: 7x = 84 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: x = \frac{84}{7} \\ \: \: \: \: \: \: \: \: \: \: \: \: x = 12$