Question 1105648

Any clever way to get to {{{x-y}}} ?


{{{13x+12y-(12x+13y)=21-29}}}
{{{13x-12x+12y-13y=-8}}}
{{{highlight(x-y=-8)}}}----------yes, this way





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This would not be necessary:
{{{12x+13x+13y+12y=29+21}}}

{{{25x+25y=50}}}

{{{x+y=2}}}