Solve for X &Y.
X+Y=1
X-Y=1
Also Y is not equal to 0
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2x =2
X= 2÷2
X =1
substitute X =1 in equation 1
X+Y =1
1+Y =1
Y =1-1
Y= 0
X= 2÷2
X =1
substitute X =1 in equation 1
X+Y =1
1+Y =1
Y =1-1
Y= 0
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