Question 201516
Let {{{x}}} = number of pages in the book
given:
Asif read {{{(3/5)*x}}} pages
There were {{{(2/5)*x}}} pages left,
and he read {{{(4/5)*(2/5)*x}}} more
The total pages he read was:
{{{(3/5)*x + (8/25)*x}}}
If there were 28 pages left, I can write:
{{{x = (3/5)*x + (8/25)*x + 28}}}
Multiply both sides by {{{25}}}
{{{25x = 15x + 8x + 700}}}
{{{2x = 700}}}
{{{x = 350}}}
There were 350 pages in the book
check:
{{{x = (3/5)*x + (8/25)*x + 28}}}
{{{350 = (3/5)*350 + (8/25)*350 + 28}}}
{{{350 = 210 + 112 + 28}}}
{{{350 = 350}}}
OK