Question

Resolva as equações sendo x um número racional.
como resolver isso?

Answer 1

$\frac{x}{3} + \frac{x}{2} = \frac{7+x}{3}\\\\\frac{2x+3x}{6} = \frac{7+x}{3}\\\\\frac{5x}{6} = \frac{7+x}{3}\\\\15x = 42 + 6x\\\\15x-6x = 42\\\\9x = 42\\\\x = \frac{42}{9}\\\\x = \frac{14}{3}$ ou 4,666...

Espero ter ajudado.