解方程 9x﹣6x=7.2 19.76÷x=3.8 1.16+2.6x=12.86 (x﹣6)×50=125 22x+1.7×5=52.5 4x+(12﹣x)×2=44.
÷50%=
11.75- 1.7=
3.6×0.25×4=
÷=
- =