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SashulF
[63]
2 years ago
15
What mistake did this student make?
Mathematics
Answer
Comment
Send
1
answer:
Novay_Z
[31]
2 years ago
7
0
X=-2 not 2.
EXPLANATION:
x-2y=12
-3x+y=-1
x-2y=12
2(-3x+y)=-1
x-2y=12
-6x+2y=-2
-5x=10
5x/-5=10/-5
x=-2
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