Question 697777
Let {{{ n }}} = number of gallons of gasoline she bought last month
given:
This month:
She bought {{{ 2n - 6 }}} gallons
{{{ 2n - 6 + n = 150 }}}
{{{ 3n = 156 }}}
{{{ n = 52 }}}
This month, she bought:
{{{ 2n - 6 = 2*52 - 6 }}}
{{{ 2n - 6 = 104 - 6 }}}
{{{ 2n - 6 = 98 }}}
She bought 98 gallons this month