\(a,x.4,25=7\\ \Rightarrow x=7:4,25\\ \Rightarrow x=\dfrac{28}{17}\\ b,116:x=14,5\\ \Rightarrow x=116:14,5\\ \Rightarrow x=8\\ c,15.x=8\\ \Rightarrow x=\dfrac{8}{15}\\ c,729:x=36\\ \Rightarrow x=729:36\\ \Rightarrow x=20,25\)
Tìm x:
a) x . 4,25 = 17
x = 17 : 4,25
x = 4
b) 116 : x = 14,5
x = 116 : 14,5
x = 8
c) 15 . x = 8
x = 8 : 15
x = 0.53333333333
d) 729 : x = 36
x = 729 : 36
x = 20.25