Răspuns :

Răspuns:  x = 32

Explicație pas cu pas:

( 48 - x ) : 2 - 9 : 3 + 5 = 10

( 48 - x ) : 2 - 3 + 5 = 10

( 48 - x ) : 2 = 10 - 5 + 3 ->  aplic metoda mersului invers

( 48 - x ) : 2 = 5 + 3

(48 - x ) : 2 = 8

48 - x = 8 × 2

48 - x = 16

x = 48 - 16

x = 32

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Verific:

( 48 - 32 ) : 2 - 3 + 5 = 16 : 2 - 3 + 5 = 8 - 3 + 5 = 5 + 5 = 10

( 48 - X ) : 2 - 9 : 3 + 5 = 10

( 48 - X ) : 2 - 3 + 5 = 10

( 48 - X ) : 2 - 3 = 10 - 5

( 48 - X ) : 2 - 3 = 5

( 48 - X ) : 2 = 5 + 3

( 48 - X ) : 2 = 8

48 - X = 8 × 2

48 - X = 16

X = 48 - 16

X = 32