Question 1137683
Let {{{ r }}} = rate per hr for babysitting
{{{ 3r + 12 = 5r }}}
{{{ 2r = 12 }}}
{{{ r = 6 }}}
$6/hr
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check:
in 3 hrs, $18
In 5 hrs, $30
and
{{{ 18 + 12 = 30 }}}
OK