Răspuns :
a+3700-2436=2090
a+3700=2436+2090
a+3700=4526
a=4526-3700
a=826
Verificare :
826+3700-2436=2090
a+3700=2436+2090
a+3700=4526
a=4526-3700
a=826
Verificare :
826+3700-2436=2090