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(P-933:3+300)*2=978 dau coronita!!!

Răspuns :

(P-933:3+300)*2=978
(P-311+300)*2=978
(x-11)*2=978
x*2-11*2=978
2x-11*2=978
2x-22=978
2x=978+22
2x=100
x=100:2
x=50