Respuesta:
a) x + 4 - 1 = 20 - 3
x + 3 = 17
x = 17 - 3
x = 14
b) 2 = 3 + x -9
2 = x - 6
8 = x
c) 3x - 7 = 17
3x = 24
x = 8
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Respuesta:
a) x + 4 - 1 = 20 - 3
x + 3 = 17
x = 17 - 3
x = 14
b) 2 = 3 + x -9
2 = x - 6
8 = x
c) 3x - 7 = 17
3x = 24
x = 8