1.设这批相册一共有X册4/5×14x=10.9x+15011.2x-10.9x=1500.3x=150x=500答：这批相册一共有500册2.设乙堆煤原来有x吨,则甲堆煤原来有（3/4x-24）吨11/8(x-48)=3/4x-24+4811/8x-66=3/4x+245/8x=90x=1443/4x-24=84答:...