78%x+45=84(解方程,求)

问题描述:

78%x+45=84(解方程,求)

78%x+45=84
0.78x=84-45
0.78x=39
x=39/0.78
x=50

50
(84-45)/0.78

0.78x=84-45
0.78x=39
x=39÷0.78
x=50

78%X=39
X=50