12-2•(k+3)=26...... .

Question

12-2•(k+3)=26...... .

Answer 1

12-2(k+3)=26
-2(k+3)=26-12
k+3=14/-2
к+3=-7
к=-7-3
к=-10
проверка
12-2(-10+3)=26
12+20-6=26
26=26

Answer 2

12-2(k+3)=26
-2(k+3)=26-12
k+3=14/-2
к+3=-7
к=-7-3
к=-10
проверка
12-2(-10+3)=26
12+20-6=26
26=26