Find the value of ?

Let, Circle be  'x' 
Star be 'y'
Triangle be 'z'

As per the fourth equation: 4x = 32

Therefore: x= 32/4 or x= 8

As per the first equation: 2x + 2z = 30
or, 2(8) + 2z = 30
or, 16 + 2z = 30
or, 2z = 30 -16
0r, 2z = 14
z = 7

As per the third equation: 2x + y+ z = 29
or, 16 + y + 7 = 29
or, y + 23 = 29
or, y = 6

Hence x=8, y=6 and z=7