Question

16x-0.5x=15.5x,运用了什么性质

Answer 1

25/x=5 x=25/5 x=5 6.7-x=0.34 x=6.7-0.34 x=6.36 3.5x=0.15+x 3.5x-x=0.15 2.5x=0.15 x=0.15/2.5 x=0.06