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a-(8-7)•5-(9-3)•8=1801dau coroană

Răspuns :

(8-7)x5-(9-3)x8=
=1x5-6x8=
=5-48=
=43
a-(8-7)x5-(9-3)x8=180
a-5-6x8=180
a-5-48=180
a-5=180+48
a-5=228
a=228+5
a=233


Verificare
233-(8-7)x5-(9-3)x8=180
233-1x5-6x8=180
233-5-48=180
228-48=180
180=180