Răspuns :
x+12=41, x =41-12, x= 29
29-x=15, x = 29-15, x= 14
7.x=63, x = 63/7, x =9
37-4x=5, 4x= 37-5, 4x= 32, x= 32/4, x=8.
29-x=15, x = 29-15, x= 14
7.x=63, x = 63/7, x =9
37-4x=5, 4x= 37-5, 4x= 32, x= 32/4, x=8.