Question

determinie a raiz das funçao abaixo:
a- y= 4x -8=0
b- x = 7x+21=0
c-y =7/3 x-6=0
d- y = x/4 - 1/2=0

Answer 1

$a)4x-8=0$
$4x=8$
$x= \frac{8}{4}$
$x=2$

$b)7x+21=0$
$7x=-21$
$x= \frac{-21}{7}$
$x=-3$

$c) \frac{7}{3}x-6=0$
$\frac{7}{3}x=6$
$x= \frac{6}{ \frac{7}{3} }$
$x=6. \frac{3}{7}$
$x= \frac{18}{7}$

$d) \frac{x}{4}- \frac{1}{2}=0$   m.m.c.(4,2)=4
$x-2=0$
$x=2$