(14-x)*50=300
Y:9+48=60
72-56:z=64

( 14 - x )•50 = 300 14 - x = 300 : 50 14 - x = 6 X = 14 - 6 X = 8 •••••••••Y : 9 + 48 = 60 Y : 9 = 60 - 48 Y : 9 = 12 Y = 12 • 9 Y = 108 ••••••••••72 - 56 : z = 64 56 : z = 72 - 64 z = 56 : 8 z = 7