第1个回答 2011-07-14
7x-8=5x+2 7x-5x=8+2 2x=10 x=5
2x-(5x-3)=3x-4 .....................................x=6/7
4(x+1-2(x-3)=18 ..........................x=4
x-1=4/1(2x-1)....................................x=2/3
3x+2(100-x)=300............................x=100
4x-3(20-x)=6x-7(11-x)......................x=17/6