Explicación paso a paso:
a) 6 + 2x = 14
2x = 8
x = 4
b) 21 - 6x = 27 - 8x
2x = 6
x = 3
c) 9x + 12 = 14(x - 2)
9x + 12 = 14x - 28
40 = 5x
x = 8
d) x - (x + 1)/2 = 3
2x - x + 1 = 6
x = 5
e) (x - 2)/3 = 6
x - 2 = 18
x = 20
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Explicación paso a paso:
a) 6 + 2x = 14
2x = 8
x = 4
b) 21 - 6x = 27 - 8x
2x = 6
x = 3
c) 9x + 12 = 14(x - 2)
9x + 12 = 14x - 28
40 = 5x
x = 8
d) x - (x + 1)/2 = 3
2x - x + 1 = 6
x = 5
e) (x - 2)/3 = 6
x - 2 = 18
x = 20