tolong dong jawab jam 12 di kumpulin saya kasih poin lebih

2x - 4 = 8
x = 6

3s = 28
s = 28/3

-d^2 = 40
d^2 = akar 40 // 6.3

5u - 10 = u - 2
4u = 8
u = 2

2x = 6
x = 3

-3 = x
3 = -x /?

x^2 = 2
x = akar 2

-7x = -5.2
x = 0.74

3 + x^3 - x = 4