Răspuns :
[tex][(a+19)*3]+11=103*2 \\ (a+19)*3=206-11 \\ a+19=195:3 \\ a=65-19 \\ a=46[/tex]
(a+19)x3 +11=206
(a+19)x3=206-11
=195
a+19=195:3
=65
a=65-19
a=46
(a+19)x3=206-11
=195
a+19=195:3
=65
a=65-19
a=46