5x+200=600-3x 5x-4=4x-3 79-3乘(x-1)=70.6 8乘 （2X-7)=5(x=13) 0.2乘(5x-1）=3+（19-5x)

5x+200=600-3x
5x+3x=600-200
8x=400
x=50
5x-4=4x-3
5x-4x=4-3
x=1
79-3(x-1)=70.6
79-3x+3=70.6
3x=82-70.6
3x=11.4
x=3.8
8(2x-7)=5(x+13)
16x-56=5x+65
11x=121
x=11
0.2(5x-1)=3+19-5x
x-0.2=22-5x
6x=22.2x=3.70| 评论

一，8x=400.x=50
二，x=1.三，79-3x+3=70.82-3x=70.x=4.

5x+200=600-3x 5x+3x=600-2008x=400x=505x-4=4x-35x-4x=4-3x=179-3(x-1)=70.679-3x+3=70.63x=82-70.63x=11.4x=3.88(2x-7)=5(x+13)16x-56=5x+6511x=121x=110.2(5x-1)=3+19-5xx-0.2=22-5x6x=22.2x=3.7