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(e-5ori6+10ori5)-50+4ori8egal42

Răspuns :

(e-30+50)-50+32=
(e-80)-50+32=
(e-80)-82=42
(e-80)=82+42
(e-80)=134 (eliminam paranteza)
e-80=134
e=134+80
e=214