Haza
Haza
30-01-2014
Mathematics
Answered
X=7y-9
X+7y=8
Need help using substitution. ?! Please
Answer :
senka
senka
30-01-2014
X=7y-9
X=-7y+8
7y-9=-7y+8
+9= +9
7y=-7y+17
+7y=+7y
14y=17
14y/14=17/14
Y=17/14
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