{1}18x-1.5x=82.5{2}8.5x-x=38.5(3)0.75x+81.5x=3294这些都要把方程列详细点.3克油了

分类: 作业答案 • 2022-01-04 13:10:32

问题描述：

答

18x - 1.5x = 82.5
16.5x = 82.5
x = 5
8.5x - x = 38.5
7.5x = 38.5
x = 77/15
0.75x + 81.5x = 3294
82.25x = 3294
x = 13176/329

答

{1}18x-1.5x=82.5
x(18-1.5)=82.5
16.5x=82.5
x=5
{2}8.5x-x=38.5
x(8.5-1)=38.5
7.5x=38.5
x=5
(3)0.75x+81.5x=3294
x(0.75+81.5)=3294
82.25x=3294
x≈40

{1}18x-1.5x=82.5{2}8.5x-x=38.5(3)0.75x+81.5x=3294这些都要把方程列详细点.3克油 了