How do you prove (x+y)-y=x

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How do you prove (x+y)-y=x

Guest Aug 21, 2015

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Best Answer

+128406

+5

Not a firm "proof," but

(x + y ) - y =

x + y - y =

x + ( y - y ) =

x + 0 =

x

CPhill Aug 21, 2015

1⁺⁰ Answers

+128406

+5

Best Answer

Not a firm "proof," but

(x + y ) - y =

x + y - y =

x + ( y - y ) =

x + 0 =

x

CPhill Aug 21, 2015

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