Hola.
A) 10 - 2x = x + 1 10 - 1 = 2x + x 9 = 3x 3 = x
Rpta : 3
b) 4x = 5 + 3x 4x - 3x = 5 x = 5
Rpta : 5
c) 25 - 2x = 3x - 35 25 + 35 = 3x + 2x 60 = 5x 12 = x
Rpta : 12
d)21x - 3 = 10x + 129 21x - 10x = 129 + 3 11x = 132 x = 12
Rpta : 12
e)38 + 7(x - 3) = 9x + 1 38 + 7x - 21 = 9x + 1 17 + 7x = 9x + 1 17 - 1 = 9x - 7x 16 = 2x 8 = x
Rpta : 8
f)3x = 12 x = 12 / 3 x = 4
Rpta : 4
g) 5(z - 12) = 27 5z - 60 = 27 5z = 87 x = 87 / 5
Rpta : 87 / 5
h) 8(t - 8) = 24 8t - 64 = 24 8t = 88 t = 11
Rpta : 11
g) 2x + 4 = 0 2x = - 4 x = - 4 / 2 x = - 2
Rpta : - 2
k) 2x - 16 = 34x - 16 = 34 - 2x - 16 = 32x - 16 / 32 = x - 1 / 2 = x
Rpta : - 1 / 2
j)15× - 18 = 17 15x = 17 + 18 15x = 35 x = 35 / 15 x = 7 / 3
Rpta : 7 / 3
Suerte y saludos !