解方程2.4-1.4x+3x+2.4=0

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解方程2.4-1.4x+3x+2.4=0

解方程2.4-1.4x+3x+2.4=0
解方程2.4-1.4x+3x+2.4=0

解方程2.4-1.4x+3x+2.4=0
2.4-1.4x+3x+2.4=0-1.4x+3x=-2.4-2.41.6x=-4.8x=-3


3x-1.4x=0
1.6x=0
x=0

2.4x-1.4x+3x+2.4=0
4x+2.4=0
4x=-2.4
x=-0.6

1.6x=-4.8 x=-3

2.4-1.4x+3x+2.4=0
1.6x=-4.8
x=-4.8/1.6
x=-3