Respuesta :

spammingallowed

Answer:

[tex]3 {x}^{2} + 5x = 7 {x}^{2} - 7x \\ {x}^{2} togather \\ 3 {x}^{2} - 7 {x}^{2} = - 7x - 5x \\ - 4 {x}^{2} = - 12x \\ 4 {x}^{2} = 12x \\ 4x = 12 \\ x = \frac{12}{4} = 3 \\ x = 3 \\ thank \: you[/tex]

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