Question

解方程下面各题6未知+2未知-3未知=15未知-3.6乘1.5=8[0.4+未知]乘6=5.4

Answer 1

[0.4+未知]乘6=5.4

[0.4+x]乘6=5.4

6乘0.4+6x=5.4

2.4+6x=5.4

6x=5.4-2.4

6x=3

x=0.5