50%X-(1000-X)10%=1000×39.2%怎么解
问题描述:
50%X-(1000-X)10%=1000×39.2%怎么解
答
50%X-(1000-X)10%=1000×39.2%
0.5X-0.1(1000-X)=392
0.5X-100+0.1X=392
0.5X+0.1X=392+100
0.6X=492
X=492÷0.6
X=820