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determina y din egalitatea : 1000-[5+2*(100+y*40-124:4]=754

Răspuns :

1000-[5+2*(100+4y-31)]=754
1000-[5+2*(69+4y)]=754
1000-(5+138+8y)=754
1000-143-8y=754
857-8y=754
-8y=754-857
y=-103:(-8)
y= 12,87