Respuesta:
5x + 4 = 49
5x = 49 - 4
5x = 45
x = 9
3x + 1 = 31
3x = 31 - 1
3x = 30
x = 10
7x + 1 = 36
7x = 36 - 1
7x = 35
x = 5
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Respuesta:
5x + 4 = 49
5x = 49 - 4
5x = 45
x = 9
3x + 1 = 31
3x = 31 - 1
3x = 30
x = 10
7x + 1 = 36
7x = 36 - 1
7x = 35
x = 5