Question

Tìm X 

X - 105 : 21 = 15                                               B, ( x - 105 ) : 21 = 15

Answer 1

X - 105 : 21 = 15        

=> x - 5 = 15

=> x = 20

b, (x-105):21=15

=> x - 105  = 15.21

=> x-105 = 315

=> x = 315 + 105

=> x = 420

Answer 2

* \(x-105:21=15\)

\(x-5=15\)

\(x=15+5\)

\(x=20\)

* \(\left(x-105\right):21=15\)

\(x-105=15.21\)

\(x-105=315\)

\(x=315+105\)

\(x=420\)

(Nhớ k cho mình với nhá!)

Answer 3

\(x-105:21=15\)

\(=x-5=15\)

\(\Rightarrow x=15+5\)

\(\Rightarrow x=20\)

\(\left(x-105\right):21=15\)

\(\Rightarrow x-105=15\cdot21\)

\(\Rightarrow x=315+105\)

\(\Rightarrow x=420\)

^_^^_^^_^

Answer 4

x - 105 : 21 = 15

x-105=15x21

x-105=315

x=315+105

x=420

------------------------------------------

(x-105):21=15

(x-105)=15x21

(x-105)=315

x=315+105

x=420

tích  nha !!

Answer 5

mk xloi , con a mk nghĩ nhầm

x-5=15

x=15+5

x=20