Question 24761
{{{2zx^2y=18}}}

x=1
y=z


{{{2zx^2y=18}}}
{{{2z *1^2* z = 18}}}
{{{2z^2= 18}}}
{{{x^2 = 9}}}
{{{z = 3 }}} or {{{z= -3}}}


Remember that since y = z, this means that y = 3 or y = -3 also.  And in both solutions, x = 1.  So you have two points in the solution which can be written (x,y,z):
(1, 3,3) and (1,-3, -3)


R^2 at SCC