40x+(2x+0.11)乘以40=258.8
问题描述:
40x+(2x+0.11)乘以40=258.8
答
40x+(2x+0.11)*40=258.8
40x+80x+4.4=258.8
120x=258.8-4.4=254.4
x=254.4/120=2.12