货车装货量是卡车四分之一,9货车相当于9×1/4卡车,
每辆卡车装货量是:
123÷(8+9×1/4)
=123÷(32/4+9/4)
=123÷41×4
=12(吨),
每辆货车装货量是:
12×1/4=3(吨),