4x+y=4.5 x-1=1.8-x-6y 方程组
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4x+y=4.5x-1=1.8-x-6y方程组4x+y=4.5x-1=1.8-x-6y方程组4x+y=4.5x-1=1.8-x-6y方程组4x+y=4.5(1)x-1=1.8-x-6y2x+6y=2.
4x+y=4.5 x-1=1.8-x-6y 方程组
4x+y=4.5 x-1=1.8-x-6y 方程组
4x+y=4.5 x-1=1.8-x-6y 方程组
4x+y=4.5 (1)
x-1=1.8-x-6y
2x+6y=2.8
x+3y=1.4 (2)
(1)×3-(2)
12x+3y-x-3y=13.5-1.4
11x=12.1
x=1.1
y=4.5-4x=0.1
4x+y=4.5 (1)
x-1=1.8-x-6y
2x+6y=2.8
x+3y=1.4 (2)
(1)×3-(2)
12x+3y-x-3y=13.5-1.4
11x=12.1
x=1.1
y=4.5-4x=0.1
4x+y=4.5 (1)
x-1=1.8-x-6y
2x+6y=2.8
x+3y=1.4 (2)
(1)×3-(2)
12x+3y-x-3y=13.5-1.4
11x=12.1
x=1.1
y=4.5-4x=0.1
4x+y=4.5 x-1=1.8-x-6y 方程组
4x+y=4.5 x-1=1.8-x-6y 方程组
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解方程组4x+5y=3.5,x-1=1.8-x-6y
4x+5y=3.5 x-1=1.8-x-6y解这个方程组
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