DonJohn DonJohn

31-03-2015
Mathematics

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X+2y=6 and x-y=3 solve by linear equations by substitution

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belcatya belcatya

31-03-2015

X+2y=6
x-y=3x=6-2y
x=3+y

6-2y=3+y
3=3y
y=1

x=3+1
x=4
Answer: (4;1)

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