Question

120％x－十二分之十一x＝6.5 4x＋0.4x=70.4 3x＋90％×4＝9 这几个方程怎么解

Answer 1

120％x－十二分之十一x＝6.5

6/5 x - 11/12 x = 6.5

17/60 x = 6.5

x = 6.5×60/17 = 22.9

4x＋0.4x=70.4

4.4x = 70.4

x=70.4/4.4 = 16

3x＋90％×4＝9

3x = 9-3.6

x=5.4/3 = 1.8