Question 909127
Let {{{ n }}} = number of text messages
Equation for monthly budget:
{{{ 60 = 39.95 + 6.65 + .1n }}}
{{{ .1n = 60 - 46.6 }}}
{{{ .1n = 13.4 }}}
{{{ n = 134 }}}
He can send or receive 134 text messages 
and not exceed his budget