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alfabet matematic : (y+5×5)-6×6 =40:2+3 .

Răspuns :

y+25 - 36 = 20+3
y+25-36 = 23
y + 25 = 23+36
y+25 = 59
y = 59-25
y = 34
(y+25)-36=23
(y+25)=23+36
(y+25)=59
y+25=59
y=59-25
y=34