a) 3x7y=5846-2372
3x7y=3474
3474+2372=5846
deci x=4 si y=4
b) 2xy3=8735-5892
2xy3=2843
8735-2843=5892
deci x=8 si y=3
c)1x3y5=8929+3426
1x3y5=12355
12355-3426=8929
deci x=2 si y=5
d) 33x3+
3x3
x3
3
3852
daca x=8
3383+383+83+3=3852
e) x444+
4x44
44x4
444x
17776
daca x=4
4444+4444+4444+4444=17776