求x 的值.x +3.5x =9.9;4.25x -x =4.55;10x -2.7x =58.4;6.8x +3.2x =100_数学解答

求x 的值.x +3.5x =9.9;4.25x -x =4.55;10x -2.7x =58.4;6.8x +3.2x =100

人气：119 ℃　时间：2020-03-24 01:15:49

解答

x+3.5x=9.9
4.5x=9.9
x=2.2
4.25x-x=4.55
3.25x=4.55
x=1.4
10x-2.7x=58.4
7.3x=58.4
x=8
6.8x+3.2x=100
10x=100
x=10