Tlg jawab ya “dikurangi”

17. 4a=-2
a=-2/4

2a=-8
a=-8/2
a=-4

18.7x=-3
x=-3/7

5x=7
x=7/5

19. 4t=8
t=8/4
t=2

-2t=-4
t=-4/-2
t=2

20. 2x-8=0
2x=8
x=8/2
x=4

3x-2=0
3x=2
x=2/3