4x+1.2乘5=24.4
4x+6=24.4
4x=24.4-6
4x=18.4
x=18.4÷4
x=4.6
将x=4.6代入4x+1.2乘5得4×4.6+6=18.4+6=24.4,即方程成立,因此方程的解为x=4.6