450 + a = 920 - 40a = 920 - 40 - 450a = 430
340 = 180 + 20320 = 200
y/6 = 63/7y = 6 * (63/7)y = 54
8b = 100 - 688b = 32b = 4
450 + a = 920 - 40
a = 920 - 40 - 450
a = 430
340 = 180 + 20
320 = 200
y/6 = 63/7
y = 6 * (63/7)
y = 54
8b = 100 - 68
8b = 32
b = 4