Question 901468
Let {{{ n }}} = number of months that
they both grow
Let {{{ h }}} = the height of the trees
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Equation for 1st tree:
{{{ h = 2n + 50 }}}
Equation for 2nd tree:
{{{ h = 1*n + 59 }}}
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Set the heights equal to eachother
{{{ 2n + 50 = n + 59 }}}
{{{ n = 9 }}}
they will be the same height in 9 months
check:
{{{ h = 2*9 + 50 }}}
{{{ h = 68 }}} inches
and
{{{ h = 1*9 + 59 }}}
{{{ h = 68 }}} inches
OK