Question

Jika Z (3+3x)=4x-7, tentukan Z invers (x) !!

Answer 1

Z(3+3x) = 4x-7
misal
t= 3+3x
maka
3x= t-3
x = t-3 / 3

Z(x) = 4(t-3 / 3) - 7
= 4t-12 / 3 -7
= 4t-12 - 21 / 3
= 4t-33 / 3

cari. invers
y = 4x - 33 / 3
3y = 4x-33
4x = 3y+33
x = 3y + 33 / 4
z-¹(x) = 3x+33 / 4