解方程15%x+25%x=4.2

分类: 作业答案 • 2022-02-14 16:39:18

问题描述：

解方程15%x+25%x=4.2

答

额，就是
0.15x+0.25x=4.2
0.4x=4.2
x=4.2/0.4=10.5吧~

答

40%x=4.2
x=4.2/40%=10.5

答

15%x+25%x=4.2
则40%x=4.2
则 0.4x=4.2
解得x=10.5

答

15%x+25%x=4.2
0.15x+0.25x=4.2
0.4x=4.2
x=4.2/0.4
x=10.5

答

15%x+25%x=4.2
0.15x+0.25x=4.2
0.4x=4.2
x=10.5

答

X=1.05

答

40%x=4.2
x= 10.5

答

15%x+25%x=4.2
40%x=4.2
0.4x=4.2
x=4.2/0.4
x=10.5