20%x+80%(x-180)=32%(x+x-180)怎么算
问题描述:
20%x+80%(x-180)=32%(x+x-180)怎么算
答
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