7x-2（4-1.5x）=2.2
7x-8+3x=2.2
10x=10.2
x=1.02
【（3.5+11.2÷0.32）×8.6-12.5】×1.01
=【（3.5+35）×8.6-12.5】×1.01
=【331.1-12.5】×1.01
=318.6×1.01
=321.786