z+4 z+69
=
8 48
6(z+4)=z+69
6z+24=z+69
5z=45
z=9
(z+4)*48=(z+69)*8
48z+192=8z+552
48z-8z=552-192
40z=360
z=360:40=9
z=9))
z+4 z+69
=
8 48
6(z+4)=z+69
6z+24=z+69
5z=45
z=9
(z+4)*48=(z+69)*8
48z+192=8z+552
48z-8z=552-192
40z=360
z=360:40=9
z=9))