Please teach me to solve sim. equations using the substitution method?

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03-09-2008, 09:42 PM

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Please teach me to solve sim. equations using the substitution method?

I can do the elimination method well but my teacher says we have to know both.i go wrong when i try substituting.here is an example question from my book:
2x+y=14
x+y=9

another:
3x+5y=29
3x+y=13

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