0.4x+0.9/0.5-0.03+0.02x/0.03=x-5/2先把带x项全部移到左边，常数项放到右边0.4x+0.02x/0.03-x=-5/2-0.9/0.5+0.03x提取出来，再计算常数项x(0.4+0.02/0.03-1)=-5/2-0.9/0.5+0.031/15x=-4.27x=-4.27*15x=-64.05
