Question

3(x+2)=5-4x ecuación lineal​

Answer 1

Hallar el valor de x

$3(x + 2) = 5 - 4x$

$3x + 6 = 5 - 4x$

$3x = 5 - 4x - 6$

$3x = - 4x - 1$

$3x + 4x = - 1$

$7x = - 1$

$x = \frac{ - 1}{7}$

$x = - \frac{1}{7}$

Verificamos

$3(( - \frac{1}{7} ) + 2) = 5 - 4( - \frac{1}{7} )$

$3( \frac{13}{7} ) = 5 - 4( - \frac{1}{7} )$

$\frac{39}{7} = 5 - 4( - \frac{1}{7} )$

Aplicar la regla –(–a) = a

$\frac{39}{7} = 5 + 4( \frac{1}{7} )$

$\frac{39}{7} = 5 + \frac{4}{7}$

$\frac{39}{7} = \frac{5*7}{7} + \frac{4}{7}$

$\frac{39}{7} = \frac{5*7 + 4}{7}$

$\frac{39}{7} = \frac{35 + 4}{7}$

$\frac{39}{7} = \frac{39}{7}$

39/7 = 39/7 Verdadero

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Espero haberte ayudado;)

Corona?