80%-4=(1-2/5)x+8

问题描述:

80%-4=(1-2/5)x+8

56/3

方程可化为0.8-4=(1-0.4)x+8再化为-3.2=0.6x+8解得0.6x=-11.2得x=-56/3

80%-4=(1-2/5)x+8
0.8-4=0.6x+8
0.6x=-12+0.8
0.6x=-11.2
x=18又 2/3

80%-4=(1-2/5)x+8
即:0.8-4=(1-0.4)x+8
得:0.6x +8= -3.2
即:0.6x= -8 -3.2
得:x= -11.2/0.6=56/3

0.8-4=0.6x+8
0.6x=0.8-4-8
0.6x=-11.2
x=-11.2÷0.6
x=-56/3

80%-4=(1-2/5)x+8
0.8-4-8=0.6x
0.6x=-11.2
x=-11.2/0.6
x=-56/3