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(?-35):5=10;(?+199):10=20

Răspuns :

x-35=50
x=75

x+199=200
x=1
(?-35):5=10
?=10x5+35
?=50+35
85
(85-35):5=50:5=10


(?+199):10=20
?=20x10-199
?=200-199
?=1
(1+199):10=200:10=20