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7 x 6 + a-3 x 7 = 29​

Răspuns :

Răspuns:

7×6+a-3×7=29

42+a-21=29

42+a=29+21=50

a=50-42=8

v:42+8-21=29

am lucrat corect!

42+a-21=29

42+a=29+21

42+a=50

A=50-42

A=8