a)168-a=60 =>a=108
b)236-a=180 =>a=56
c)426:a=1973-1902 =>426:a=71 =>a=6
d)ax13=2031-1706 =>ax13=325 =>a=325:13 =>a=25
e)Aici nu stiu care e deimpartitul si care e impartitorul... Foloseste niste paranteze si apoi il rezolv !
f)20:a=700:35=>20:a=20 =>a=1
g)a:8=32:16 =>a:8=2 =>a=16
h)6xa:19=144 =>6xa144x19 =>6xa=2736 =>a=2736:6 =>a=456
i)9xa:13=819 =>9xa=10647 =>a=10647:9 =>a=1183
j)192:a=6 =>a=192:6 =>a=32
k)4b+3=47x19+6 =>4b+3=899 =>4b=896 =>b=896:4 =>b=224
