👤

efectuati (87-9x4-e)-5x5+10:2=5x2-0:4x7

Răspuns :

87-36-e-25+5=10
-e= 10-51+25-5
-e=-21
e=21
(87-36-e)-25+5=10-0
(51-e)-25+5=10
(51-e)-25=10-5
(51-e)-25=5
51-e=5+25
51-e=30
e=51-30
e=21