no 5,6,7,8, tlong dibantu donk, cara penyelesainya gimna? soalnya buat ujian please bantu

5) y = 2x-1 / 3+x
y(3+x) = 2x-1
3y+xy = 2x-1
xy-2x = -3y-1
x(y-2) = -3y-1
x = -3y-1/ y-2
= 3y+1/ 2-y
f'x = 3x+1/ 2-x

6) y = x²+5
x² = y-5
x = √y-5
f'x = √x-5