Solve each equation and show the steps you followed.
1.) -50 = -2(a + 3)
2.) 4 (x - 2) = 2(x - 4) + 2x
3.) 5(y - 2) - 2. = 2(y + 1) - 5
4.) -4(p + 1) = 2(8 - 2p)