Question

find the solution of the if we multiply the sum of 8 and a number with 3, we get 81

Answer 1

$Let\:the\:number\:be\:x\\\\A.T.Q.\\\\Sum\:of\:8\:and\:x\:when\:multiplied\\by\:3\:we\:get\:81.\:So,\\\\3(8+x)=81\\\\24+3x=81\\\\3x=81-24\\\\3x=57\\\\x=\frac{57}{3}\\\\x=19$

$\bf{Hence,the\:required\:number\:is\:19.}$

Answer 2

Answer:

LET THE NO. BE - X

THEN,

3(8X+X) - 81

24+X -81

81-24 - 57

x-57