Question

Ramesh had some $2 bills and $5 bills in his wallet. There were 4 times as many $2 bills as $5 bills. Ramesh had $91 altogether. How many $2 bills did Ramesh have in total?

Answer 1

If there were x $5 bills, then
2*4x + 5x = 91
Now finish it off

Answer 2

If you had 7 * $5 = $35, you would need 28 * $2 = $56

$35 + $56 = $91

Sorry that I can't provide you with an equation.