27.496+a=27496
a+11.236=93.425
a-15.263=49.478

Răspuns:
a+11.236=93.425
a=93.425-11.236
a=82.189
a-15.263=49.478
a=49.478+15.263
a=64.741
27.496+a=27496
a=27.496-27.496
a=0