Question 1130624
Let {{{ x }}} = number of $1 bills
{{{ 53 - x }}} = number of $10 bills
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{{{ x + 10*( 53 - x ) = 206 }}}
{{{ x + 530 - 10x = 206 }}}
{{{ 9x = 324 }}}
{{{ x = 36 }}}
and
{{{ 53 - x = 53 - 36 }}}
{{{ 53 - x = 17 }}}
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He has 36 $1 bills and 17 $10 bills
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check:
{{{ x + 10*( 53 - x ) = 206 }}}
{{{ 36 + 10*17 = 206 }}}
{{{ 36 + 170 = 206 }}}
{{{ 206 = 206 }}}
OK