(1-15%)x+(80000-x)乘(1-12%)=69440
问题描述:
(1-15%)x+(80000-x)乘(1-12%)=69440
答
楼主你好
0.85x+0.88(80000-x)=69440
0.85x+70400-0.88x=69440
0.85x-0.88x=69440-70400
-0.03x=-960
x=32000
满意请点击屏幕下方“选为满意回答”,谢谢.