Question 1061503
I could say:
{{{ x + 7 = z }}}
then:
{{{ z^2 + 5z - 50 = 0 }}}
By looking at this I see:
{{{ ( z + 10 )*( z - 5 ) = 0 }}}
{{{ z = -10 }}}
{{{ z = 5 }}}
and
{{{ x + 7 = z }}}
{{{ x + 7 = -10 }}}
{{{ x = -17 }}}
and
{{{ x + 7 = 5 }}}
{{{ x = -2 }}}
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Here's the plot:
{{{ graph( 600, 400, -20, 5, -60, 6,  (x+7)^2 + 5*(x+7) - 50 ) }}}