Răspuns :
(x+16): 3 +19 = 29
x+16 = a
a:3 +19=29
a:3= 29-19
a:3 = 10
a =10*3
a=30
x+16 = 30
x=30-16
x=14
verificare: (14+16):3 +19=29
30:3+19=29
10+19=29
29=29
(x+16): 3 +19 = 29
x+16 = a
a:3 +19=29
a:3= 29-19
a:3 = 10
a =10*3
a=30
x+16 = 30
x=30-16
x=14
verificare: (14+16):3 +19=29
30:3+19=29
10+19=29
29=29