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8x8-32-(6xi-51)-(40-2x10) egal 3*3

Răspuns :

=64-(6*i-51)-(40-20)=9
=64-(6*1-51)-20=9
=6*i-51-20=55
=6*i-51=75
6*i=126
i= 126:6
i= 21

32-(6X-51)-20=9
12-(6X-51)=9|12-
6X-51=12-9
6X-51=3|+51
6X=54|:6
X=9