Question

Tìm số nguyên \(x\), biết :

                   \(9-25=\left(7-x\right)-\left(25+7\right)\)

Answer 1

9 - 25 = ( 7 - x ) - ( 25 + 7 )

=> -16 = 7 - x - 32

=> x = 7 - 32 + 16

=> x = -9.

Answer 2

9 - 25 = (7 - x) - (25 + 7)

-16 = (7 - x) - (25 + 7)

-16 = (7 - x) - 32

-16 = 7 - x - 32

=> x = 7 - 32 - (-16)

x = -9

Vậy x = -9

Answer 3

9 – 25 = ( 7 – x ) – (25+7)

9 +( -25) = 7 – x – 25 – 7

-16 = 7 – x – 25 – 7

x = 7 – 7 – 25 +16

x = - 25 + 16

x = -9