Question

TIM SO NGUYEN X BIET :

   A, (X-5)-7=X-1-(X-2)

giup mk voi, ai nhanh mk tick

Answer 1

(x-5)-7=x-1-(x-2)

x-5-7=x-1-x+2

x-12=1

x=13

Answer 2

\(\left(x-5\right)-7=x-1-\left(x-2\right)\)

\(x-5-7=x-1-x+2\)

\(x+2=1\)

\(x=-1\)

Answer 3

x-5-7=x-1-x+2

x-12-1=0

x-13=0

x=13

Answer 4

a, \(\left(x-5\right)-7=x-1-\left(x-2\right)\)

\(\Leftrightarrow x-5-7=x-1-x+2\)

\(\Leftrightarrow x-12-1=0\)

\(\Leftrightarrow x-12=1\)

\(\Leftrightarrow x=13\)

Answer 5

a)     ( x - 5 ) -7 = x - 1 - (x-2 )

<=>x - 5 - 7       = x - 1 - x + 2

<=> x - 12   - 1   = 0 

<=> x -13           = 0

<=> x                = 0 + 13

<=> x               = 13

Vậy x = 13