Question 1132050
Variables X, y, and x.
{{{X=x}}}?
{{{X<>x}}}?



If you mean to have two equations and TWO unknown variables, then make it as  {{{system(21x+7y=42,-5x+5y=10)}}}


and that system simplifies to {{{system(3x+y=6,x-y=-2)}}}
and ready for eliminating y to quickly solve for x....