Răspuns :
316+a=573
a=573-316
a=257
a+289=602
a=602-289
a=313
931-a=457
a=931-457
a=474
a-385=299
a=299+385
a=684
403-a=177
a=403-177
a=226
a+586=900
a=900-586
a=314
Răspuns:
316+a=573
a=573-316
a=257
v:316+257=573
a+289=602
a=602-289
a=313
v:313+289=602
a-385=299
a=299+385
a=684
v:684-385=299
a+586=900
a=900-586
a=314
v:314+586=900