Respuesta:
a) x = -14
b) x = 8
c) x = 0
d) x = -5
e) x =-2
Explicación paso a paso:
a) 2x + 13 = -15
2x = - 15 - 13
2x = -28
x = -28/2
x= -14
b) 7x + 8 = 64
7x = 64 - 8
7x = 56
x = 56/7
x = 8
c) 20 = 3x - 5 . (-4)
3x - 5 . (-4) = 20
3x + 20 = 20
3x = 20 - 20
3x = 0
x = 0/3
x = 0
d) x + 3x + 5 = -3 . 5
x + 3x = -3 . 5 - 5
4x = -20
x = -20/4
x = -5
e) 3 . 4 - 5 . 6 = 2x + 7x
2x + 7x = 3 . 4 - 5 . 6
9x = 12 - 30
9x = -18
x = -18/9
x = -2
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Verified answer
Respuesta:
a) x = -14
b) x = 8
c) x = 0
d) x = -5
e) x =-2
Explicación paso a paso:
a) 2x + 13 = -15
2x = - 15 - 13
2x = -28
x = -28/2
x= -14
b) 7x + 8 = 64
7x = 64 - 8
7x = 56
x = 56/7
x = 8
c) 20 = 3x - 5 . (-4)
3x - 5 . (-4) = 20
3x + 20 = 20
3x = 20 - 20
3x = 0
x = 0/3
x = 0
d) x + 3x + 5 = -3 . 5
x + 3x = -3 . 5 - 5
4x = -20
x = -20/4
x = -5
e) 3 . 4 - 5 . 6 = 2x + 7x
2x + 7x = 3 . 4 - 5 . 6
9x = 12 - 30
9x = -18
x = -18/9
x = -2
P.D. más al rato te paso los demás