Espero te ayude
Explicación paso a paso:
1. -7x - 42 - 5 = - 19
-7x -47 = -19
-7x = 28
x = -4
2. 8k - 24 + 12 = - 28
8k -12 = -28
8k = -16
k = -2
3. -45 + 9x + 3 = 3x - 6
-42 + 9x = 3x - 6
6x = 36
x = 6
4. 2m - 6 - 3m = 5
-m = 11
m = -11
5. 8x - 30 = 2x - 6
6x = 24
x = 4
Respuesta:
1) - 7(x +6) - 5 =-19
- 7x + - 42 - 5 =-19
-7x + - 47 = - 19
-7x = - 19 - (-47)
X = 28/ - 7
X = - 4
2) 8 (k-3)+12=-28
8k - 24 +12 =-28
8k - 12 = - 28
8k = - 28 +12
8k = - 16
K= - 16/8
K= - 2
3) - 9(5-x) +3 = 3x - 6
-45 + 9x +3 =3x - 6
-45+3 +6 = 3x - 9x
-36= - 6 x
X = - 36 /6
X = - 6
4) 2(m-3)- 3m =5
2m - 6 - 3m =5
2m - 3m =5+6
-1m = 11
M= 11/-1
M= - 1
5) 8x - 30=2 (x-3)
8x - 30= 2x - 6
8x + 2x = - 6 +30
10x = 24
X = 24 / 10
X = 2,4
