Mathematics
Junior High
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答え付きで解き方教えてくださいm(_ _)m
[
, y =
=X
5
13
)
X
Z=R² + x ²
(5)
(4)
【
x 2(3x+2y+7)=-6(2x+y) − 3y+11
5(x+y)-11x-6y=10y-8
X=
, y =
)
10
(6) 7a-b
)
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