X+X*2.25%*80%＝5090等于多少
问题描述：
X+X*2.25%*80%＝5090等于多少
答
x + x*2.25%*80% = 5090
x + 0.0225x*0.8 = 5090
x + 0.018x = 5090
1.018x = 5090
x = 5090 ÷ 1.018
x = 5000