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(dx4+20):4=12;(c-104+2)x5+3=98

Răspuns :

(dx4+20):4=12
dx4+20=12x4
dx4+20=48
dx4=48-20
dx4=28
d=28:4
d=7

(c-104+2)x5+3=98
(c-104+2)x5=98-3
(c-104+2)x5=95
c-104+2=95:5
c-104+2=19
c-104=19-2
c-104=17
c=17+104
c=121