1/3x+1/4x+2.8=x

问题描述:

1/3x+1/4x+2.8=x

1/3x+1/4x+2.8=x
x-1/3x-1/4x=2.8
x-4/12x-3/12x=2.8
5/12x=14/5
x=14/5x12/5
x=168/25