140X+20X=400求解题步骤急!

问题描述:

140X+20X=400求解题步骤急!

140X+20X=400

合并同类项得:
(140+20)X=400
160X=400
解得:X=400/160
X=5/2

(140+20)X=400
160X=400
X=400/160=5/2

140X+20X=400
(140+20)X=400
160X=400
X=400/160
X=5/2