Explicación paso a paso:
por método de igualacion
3x = 4 (5 - x) + 1
3x = 20 - 4x + 1
3x + 4x = 21
7x = 21
x = 3
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Explicación paso a paso:
por método de igualacion
3x = 4 (5 - x) + 1
3x = 20 - 4x + 1
3x + 4x = 21
7x = 21
x = 3