［（1+30％）x+（1+20％）（500-x）］×0.9-500=67怎么解？

Answer 1

［（1+30％）x+（1+20％）（500-x）］×0.9-500=67
解：［1.3x+600-1.2x］×0.9=67+500
[0.1x+600］=567÷0.9
0.1x+600=630
0.1x=630-600
0.1x=30
x=300

Answer 2

（1.3X+1.2乘500-1.2X）乘0.9-500=67
1.17X+540-1.08X=567
0.09X=27
X=300

Answer 3

Answer 4

追答

得300

速度解答，保证正确

Answer 5

（1.3x+600-1.2x）×0.9-500=67
0.09x+540-500=67
0.09x=27
x=300