Question

Tìm x:

a, X x 5 = 9,5                               b, 42 x X = 15,12

 

Answer 1

a: 5x=9,5

nên x=1,9

b: 42x=15,12

nên x=15,12:42=0,36

Answer 2

a, \(x=\dfrac{9,5}{5}=\dfrac{19}{10}\)

b, \(x=\dfrac{15,12}{42}=\dfrac{9}{25}\)

Answer 3

a.\(x\times5=9,5\)

\(\Rightarrow x=9,5:5=1,9\)

b.\(42\times x=15,12\)

\(\Rightarrow x=15,12:42=0,36\)

Answer 4

\(a,x\times5=9,5\\ \Rightarrow x=9,5:5\\ \Rightarrow x=1,9\\ b,42\times x=15,12\\ \Rightarrow x=15,12:42\\ \Rightarrow x=0,36\)

Answer 5

a, X x 5 = 9,5                 

X = 9,5 : 5

X = 1,9
b, 42 x X = 15,12

X =15,12 : 42

X = 0,36