求未知数的值.6.2-x =416,7x+2.5x =3.8,(3.8-2)x =14.4,3x -0.5=5.8,4*6+4x =84,10*(15-x )=120

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求未知数的值.6.2-x=416,7x+2.5x=3.8,(3.8-2)x=14.4,3x-0.5=5.8,4*6+4x=84,10*(15-x)=120求未知数的值.6.2-x=416,7x+2.5

求未知数的值.6.2-x =416,7x+2.5x =3.8,(3.8-2)x =14.4,3x -0.5=5.8,4*6+4x =84,10*(15-x )=120
求未知数的值.6.2-x =416,7x+2.5x =3.8,(3.8-2)x =14.4,3x -0.5=5.8,4*6+4x =84,10*(15-x )=120

求未知数的值.6.2-x =416,7x+2.5x =3.8,(3.8-2)x =14.4,3x -0.5=5.8,4*6+4x =84,10*(15-x )=120
6.2-x=416
x=-409.8;
7x+2.5x=3.8
9.5x=3.8
x=0.4;
(3.8-2)x =14.4
1.8x=14.4
x=8;
3x-0.5=5.8
3x=6.3
x=2.1
4*6+4x =84
24+4x=84
4x=60
x=15
10*(15-x )=120
150-10x=120
10x=30
x=3

以后还是多学点,是不是爱贪玩,不好好学习?
按你的顺序:
X=-409.8
X=0.4
X=8
X=2.1
X=15
X=3