£10 - £1.50 = £8.50
£8.50/2 = £4.25 (equal amount of both food and bus-fare)
£4.25+ £1.50 = £5.75 (We add £1.50 back on because we took it away from the orginal ten pounds to see how much amount is actually equal on both costs.)
£5.75 is bus fare
£4.25 is food
to check out if the bus fare is £1.50 more than food costs, you:
£5.75 - £4.25 = £1.50