x+3\4x=280怎么解.

x+3\4x=280怎么解.
x+3\4x=280怎么解.

x+3\4x=280怎么解.
x+3\4x=280
7x/4=280
x=280*4/7
x=160

x+3\4x=280
7/4x=280
x=280*4/7=160

X+3/4x=280
(1+3/4)x=280
7/4x=280
x=4/7*280
x=160

先左边通分得【（4+3）x】/4=280
在两边同乘以4得7x=1120
最后两边同除以7得x=160