Let
B
r
r
≥
0
,
J
r
r
≥
0
, and
C
r
r
≥
0
be the balancing, Jacobsthal, and Lucas balancing numbers, respectively. In this paper, the diophantine equations
B
r
=
J
s
+
J
t
and
C
r
=
J
s
+
J
t
are completely solved. The solutions rely basically on Matveev’s theorem on linear forms in logarithms of algebraic numbers and a procedure of reducing the upper bound due to Dujella and Pethö.