Question

equação de1grau 3(x+5)-(x+7)=4(1-x)

Answer 1

$3(x+5)-(x+7)=4(1-x)$
$3x+15-x-7=4-4x$
$2x+8=4-4x$
$2x+4x=4-8$
$6x=-4$
$x= \frac{-4}{6}$
simplificando por 2 
$x= \frac{-2}{3}$