Mathematics
Senior High
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この連立三元一次方程式の求め方を教えてください🙇🏻♀️
150 【連立3元1次方程式】 次の連立方程式を解け。
x+y+z=13
x+2y+3z=7
(1)*x+2y-z=7
2x+3y+z=8
3x-y+z=23
[3x+y+22=9
口 (2)
x+y=3
(3)*y+2=5
z+x=6
Wr D 59 5
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