Найдите корешки уравнения : (6 класс) 2х-5=х+1 7(х+6)=4(5х+4) 1/6 (х+9)= -

1) 2x - 5 = x + 1
2x - x = 1 + 5
x = 6
2) 7(x + 6) = 4(5x + 4)
7x + 42 = 20x + 16
42 - 16 = 20x - 7x
13x = 26
x = 26/13
x = 2
3) 1/6(x + 9) = -1/3x
1/6x + 9/6 = -1/3x
1/6x - (-1/3x) = 9/6
1/6x + 2/6x = 9/6
3/6x = 9/6
x = 9/6 * 6/3
x = 54/18
x = 3
4) 3(х - 5) = х + 3
3x - 15 = x + 3
3x - x = 3 + 15
2x = 18
x = 18/2
x = 9
5) 1,5(х + 8) = - 4х + 1
1,5x + 12 = -4x + 1
1,5x + 4x = 1 - 12
5,5x = -11
x = -11/5,5
x = -2
6) 3/4(х + 8) = 2х + 1
3/4x + 24/4 = 2x + 1
3/4x + 6 = 2x + 1
6 - 1 = 2x - 3/4x
5/4x = 5
x = 5 * 4/5
x = 20/5
x = 4