Question

1. ( x-273 ) . 38 = 0

2. ( 179 -x ) - 12 = 57

3. x- 105 : 21 = 15

4. ( x - 105 ) : 21 = 15

Trình bày luôn nha

Answer 1

1) \(\left(x-273\right)\times38=0\)

\(\Rightarrow x-273=0:38\)

\(\Rightarrow x-273=0\)

\(\Rightarrow x=0+273\)

\(\Rightarrow x=273\)

Vậy x = 273

2) \(\left(179-x\right)-12=57\)

\(\Rightarrow179-x=57+12\)

\(\Rightarrow179-x=69\)

\(\Rightarrow x=179-69\)

\(\Rightarrow x=110\)

Vậy x = 110

3) \(x-105:21=15\)

\(\Rightarrow x-5=15\)

\(\Rightarrow x=15+5\)

\(\Rightarrow x=20\)

Vậy x = 20

4) \(\left(x-105\right):21=15\)

\(\Rightarrow x-105=15\times21\)

\(\Rightarrow x-105=315\)

\(\Rightarrow x=315+105\)

\(\Rightarrow x=420\)

Vậy x = 420

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Answer 2

 1. (x - 273).38 = 0

=> x - 273 = 0

=> x = 0 + 273

=> x = 273

vậy_