x×(40%+20%)=72
x×0,6=72
x=72:0,6
x=120
40% x X+X x 20%=72
X x (40%+20%)=72
X x 60% =72
X = 72 : 60%
X=120\
Học tốt
x×(40%+20%)=72
x×0,6=72
x=72:0,6
x=120
40% x X+X x 20%=72
X x (40%+20%)=72
X x 60% =72
X = 72 : 60%
X=120\
Học tốt
tim x
40%xX+Xx20%
40%xX+20%=72
Xx20-X:0,1=2016
x=?
40%xX+X nhan 20%=72
B. 54,3 x4,7+54,3x4,3+54,3(Bang cach thuan tien nha)
Ai giai ho minh hai bai nha
tìm x:
a, X+20%xX=7,2
b,40%xX+X+20%=7,2
giúp mk nhé mai nộp rùi
40÷72
40%*x+x*20%=72
40%*X+X*20%=72
40%x X+ X x20%=72