Solución:
[tex] \frac{x}{7} = \frac{x - 3}{4} \\ 4x = 7(x - 3) \\ 4x = 7x - 21 \\ 4x - 7x = - 21 \\ - 3x = - 21 \\ x = 7[/tex]
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Verified answer
Solución:
[tex] \frac{x}{7} = \frac{x - 3}{4} \\ 4x = 7(x - 3) \\ 4x = 7x - 21 \\ 4x - 7x = - 21 \\ - 3x = - 21 \\ x = 7[/tex]
Espero te sirva (≧σ≦)