(x+10)*0.3-(x-10)*1/3=5 求x，要步骤

Question

如题所述

Answer 1

(x+10)*0.3-(x-10)*1/3=5 (x+10)*0.3*30-(x-10)*1/3*30=5 *30 (x+10)*9-(x-10)*10=5 9x+90-10x+100=150 9x-10x=150-90-100 -x=-40 x=40