Помогите 6 класс срочно!!! а) -15х+31=-7+4х б) 11-х=55+х в)28-4х=19-х г)-35-2х=42+9х

Решите задачу:

$- 15x + 31 = - 7 + 4x \\ - 15x - 4x = - 7 - 31 \\ - 19x = - 38 \\ x = - 38 \div ( - 19) \\ x = 2$
$11 - x = 55 + x \\ - x - x = 55 - 11 \\ - 2x = 44 \\ x = 44 \div ( - 2) \\ x = - 22$
$28 - 4x = 19 - x \\ - 4x + x = 19 - 28 \\ - 3x = - 9 \\ x = - 9 \div ( - 3) \\ x = 3$
$- 35 - 2x = 42 + 9x \\ - 2x - 9x = 42 + 35 \\ - 11x = 77 \\ x = 77 \div ( - 11) \\ x = - 7$