方程5(x-1,.2)=12-4x怎么解

方程5(x-1,.2)=12-4x怎么解
方程5(x-1,.2)=12-4x怎么解

方程5(x-1,.2)=12-4x怎么解
5(x-1,.2)=12-4x
5x-6=12-4x
9x = 18
x=2

拆括号，得5X-5·1.2=12-4X
5X-6=12-4X
左右移项得9X=18
X=2

去括号，得
5x-6=12-4x
5x+4x=12+6
9x=18
x=2