Răspuns :
72-2*x=36 -2*x = 36 -2*x
36 -2*x =36-72. -2x=-36|*(-1)
. 36 -2*x =36-72. -2x=-36|*(-1). 2x = 36. x=1
36 -2*x =36-72. -2x=-36|*(-1)
. 36 -2*x =36-72. -2x=-36|*(-1). 2x = 36. x=1