第1个回答 2015-01-10
8x-3x=105
5x=105
5x÷5=105÷5
x=21;
13.2x+9x=33.3
22.2x=33.3
22.2x÷22.2=33.3÷22.2
x=1.5;
2x+1.5x=17.5
3.5x=17.5
3.5x÷3.5=17.5÷3.5
x=5;
x-0.36x=16
0.64x=16
0.64x÷0.64=16÷0.64
x=25;
6.2x-x=41.6
5.2x=41.6
5.2x÷5.2=41.6÷5.2
x=8;
32.8+9x=118.3
32.8+9x-32.8=118.3-32.8
9x÷9=85.5÷9
x=9.5.