Question 1067115
Let {{{ n }}} = number of houses cleaned
If I'm reading this right,
{{{ ( 4 + 20 )*n + 50 <= 315 }}}
{{{ 24n + 50 <= 315 }}}
{{{ 24n <= 265 }}}
{{{ n <= 11 }}}
So, they would make a profit after
cleaning 12 houses