Răspuns:
1)a+13.476=103.358
a=103.358-13.476
a=89.882
89.882+13.476=103.358
2)b-26.429=132.456
b=132.456-26.429
b=106.027
106.027-26.429=132.456
3)816.264-c=239.453
c=816.264-239.453
c=576.811
816.264-576.811=239.453
4)429.137-a=87.398
a=429.137-87.398
a=314.739
429.137-314.739=87.398