A few days ago
x+2y=9 and 3x+2y=7?
heyy someone help me with thisss..you have to solve by elimination
Top 3 Answers
A few days ago
Favorite Answer
x+2y=9
-3x-2y=-7 (subtract the bottom equation so u can eliminate the 2y)
-2x=2 (this is wut u get after elimination)
x=-1 (plug this back into either equation)
x+2y=9
-1+2y=9
2y=10
y=5
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A few days ago
next time be specific.
is this an elimination by addition or by substitution?
x+2y=9
x=9-2y <--- tada! the value of x 3(9-2y)+2y=7 -- after substitution, then use distribution 27-6y+2y=7 27-4y=7 -4y=7-27 -4y=-20 y=-20/-4 y=5
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A few days ago
(3x+2y)-(x+2y)=7-9
3x-x=7-9
2x=7-9
2x=-2
x=-2/2
x=
9- -1=2y
10=2y
y=
0
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