0.13(10-x)+0.17(10-2x)+0.22(10-3x)+0.28(10-4x)=2_数学解答

0.13(10-x)+0.17(10-2x)+0.22(10-3x)+0.28(10-4x)=2

人气：131 ℃　时间：2020-05-23 18:39:10

解答

0.13(10-x)+0.17(10-2x)+0.22(10-3x)+0.28(10-4x)=2
1.3-0.13x+1.7-0.34x+2.2-0.66x+2.8-1.12x=2
(0.13+0.34+0.66+1.12)x=1.3+1.7+2.2+2.8-2
2.25x=6
x=6÷2.25
x=8/3