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(6•3•b-1278):298=18.

Răspuns :

Răspuns:

( 6 3 b - 1278 ) : 298 = 18

( 18 b - 1278 ) : 298 = 18

18 b - 1278 / 298 = 18

2 ( 9 b - 639 ) / 298 = 18

9 b - 639 / 149 = 18

149 ( 9 b - 639 ) = 149 × 18

9 b - 639 = 2682

9 b = 2682 + 639

9 b = 3321

b = 3321 : 9

b = 369