kak tolong y,besok mau dikumpulkan

a) 2x-4=8
2x = 8+4
x= 12 ÷6
x=2

b) -4+3s=24
3s= 24+4
3s=28
s= 9,3

c)
[tex] - 8 - {d}^{2} = 32 \\ - {d}^{2} = 32 + 8 \\ - {d}^{2} = 40 \\ {d}^{2} = \sqrt{40} \\ d = 2 \sqrt{10} [/tex]
d) 5(x-2) = x-2
5x -10 = x-2
4x = 8
x = 2

e) 2x -1 = 5
2x = 6
x=3

f) -3= x
x = - 3

g)
[tex] {x}^{2} + 7 = 9 \\ {x }^{2} = 2 \\ x = \sqrt{2} [/tex]

h) 5,2 - 7x =0
7x = 5.2
x = 0,743

i)
[tex]3 - {x}^{3} - x = 4 \\ {x}^{3} - x - = 1 \\ x( {x}^{2} - 1) = 1 \\ x = 1 \: atau \: x = \sqrt{2} [/tex]

j) 10=x+6
4=x