20%x+80%（x-180）=32%（x+x-180）
0.2x+0.8x-144=0.64x-57.6
x-0.64x=144-57.6
0.32x=86.4
x=86.4÷0.32
x=270可答案是240呀答案错了x-0.64x=144-57.60.32x=86.41-0.64=0.32？？？？？因该是0.3620%x+80%（x-180）=32%（x+x-180）0.2x+0.8x-144=0.64x-57.6x-0.64x=144-57.60.36x=86.4x=86.4÷0.36x=240 这样对了