Help pls ...................................

1). -3x = 0.3
==> x = 0.3/(-3)
==> x = -0.3/3
==> x = -0.1
2). x/3 = -12
==> x = -1/6
3). -1.2x = -30
==> x = -30/(-1.2)
==> x = 30/1.2
==> x = 300/12
==> x = 25
4). x/(-1.2) = -0.3
==> x = -0.3 × (-1.2)
==> x = 0.36