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(6*9-z)-3*10+16:2=4*3*1

Răspuns :

(54-z)-30+8=12
54-z-22=12
54-22-12=z
20=z  sau z=20
(6*9-z)-3*10+16:2=4*3*1
(54-z)-3*10+8=12
(54-z)-30+8=12
(54-z)-30=12-8
(54-z)-30=4
54-z=30+4
54-z=34
z=54-34
z=20

Sper ca te-am ajutat