Help im really stuck

find x for them and show your working is the question but i dont know how to do them so 10 points to whoever answers them and if you can show working but isnt necessary!

5(x+3)=7x+5

3(2x-1)= 5(3x-15)

3(x+2) -2(3x-5) =10

4(2x-3) -3 (3x-10) =11

1) 5x + 15 = 7x + 5
15 - 5 = 7x - 5x
10 = 2x
x = 5

2) 6x - 3 = 15x - 75
75 - 3 = 15x - 6x
72 = 9x
x = 8

3) 3x + 6 - 6x +10 = 10
3x - 6x = 10 - 6 - 10
-3x = -6
x = 2

4) 8x - 12 - 9x + 30 = 11
8x - 9x = 11 + 12 - 30
-1x = -7
x = 7

Made a little math error on 2, but I corrected it.