Question

解方程:15%+5%XX{500-X}=500X88%

Answer 1

因为不清楚你的5%后的是乘还是未知数,我就做出题的

15% + 5%（500-X)=500 x 88%

原式 → 0.15 + 25 - 0.05X =440

→ 0.05X = -414.85

→ X = -8297