Question

ayudaaa.es urgenteeee

Answer 1

Despejando "x" :

a)

x / 3 = 4 / ( x - 1 )

( x - 1 ) . x = 3 . 4
x² - x = 12
x² - x - 12 = 0     → Solucion por discriminantes : " x₁=4 , x₂=-3 "

c)

( x +6 ) / ( x + 1 ) = ( x - 3 ) / ( x + 2 )

(x + 6 ) . ( x + 2 ) = ( x - 3 ) . ( x + 1 )
x² +2x + 6x + 12 = x² + x - 3x - 3
x² + 8x + 12 = x² - 2x - 3
x² - x² + 8x + 2x = - 3 - 12
10x = -15
x = -15/10
x = -3/2       → Solución