Помогите решить уравнение по математике
1/4:(3/4х-1/2)+2/5=1/2 1/4:(3/4х-1/2)=1/2-2/5 1/4:(3/4х-1/2)=5/10-4/10 1/4:(3/4х-1/2)=1/10 3/4х-1/2=1/4:1/10 3/4х-1/2=10/4 3/4х=2 1/2+1/2 3/4х=3 х=3:3/4 х=4