Himpunan penyelesain dari -3|x - 4| + 5=4 adalah

Misalkan 
y = |x - 4|
maka

-3y + 5 = 4
-3y = -5 + 4
-3y = -1
y = 1/3

y = 1/3
|x - 4| = 1/3

x - 4 = 1/3
x = 1/3 + 12/3
x = 13/3

atau

x - 4 = -1/3
x = -1/3 + 12/3
x = 11/3

Jadi HP : {11/3 , 13/3}

-3 |x - 4| + 5 = 4
= -3|x-4|=4-5
=-3|x-4|=-1
=-3(x-4)=-1,x-4 ≥0
=-3×(-(x-4))=-1,x-4<0
=x13/3,x≥4
=x=11/3,x<4
x1=11/3
X2=13/3

maaf jika salah, semoga membantu :)