Question 998384
Let profit = {{{ P(x) }}}
{{{ P(x) = R(x) - C(x) }}}
{{{ P(x) = 15x - ( 5x + 20 ) }}}
{{{ P(x) = 15x - 5x - 20 }}}
{{{ P(x) = 10x - 20 }}}
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given:
{{{ P(x) = 500 }}}
{{{ 500 = 10x - 20 }}}
{{{ 10x = 520 }}}
{{{ x = 52 }}}
52 tacos sold make a $500 profit