Răspuns :
a) -a = 210-11-463
-a = -264 | (-1)
a = 264
b) 9a = 86-14
9a = 72
a = 72/9
a = 8
A) 463-a+11=210
463-a=210-11
463-a= 199
a=463-199
a=264
B) 9×a+14=86
9×a=86-14
9×a=72
a=72:9
a=8
463-a=210-11
463-a= 199
a=463-199
a=264
B) 9×a+14=86
9×a=86-14
9×a=72
a=72:9
a=8