Răspuns :
a) x = 13-6 =7
b) x = 21-5 =16
c) x = -9-8 = -17
d) x = -37-15 = -52
e) x = 25+7 = 32
f) x = 19+11 = 30
g) x = 29+18 = 47
h) x = -27 +18 = -9
i) x = -42+25 = 23
j) x = 9-16 =-7
k) x = 11-23 = -12
l) x = -2019 -2020 = -4039
a) x = 13-6 =7
b) x = 21-5 =16
c) x = -9-8 = -17
d) x = -37-15 = -52
e) x = 25+7 = 32
f) x = 19+11 = 30
g) x = 29+18 = 47
h) x = -27 +18 = -9
i) x = -42+25 = 23
j) x = 9-16 =-7
k) x = 11-23 = -12
l) x = -2019 -2020 = -4039