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2x{2+2x[2+2x(2-2:a)]}=22-2

Răspuns :

2+2×[2+2×(2-2:a)]=20:2=10
2×[2+2×(2-2:a)]=10-2=8
2+2×(2-2:a)=8:2=4
2×(2-2:a)=4-2=2
2-2:a=2:2=1
2:a=2-1=1
a=2:1=2

RASPUNS : a=2