Question

Resolva as equacões: a)3x menos 10 =x+6 é b)2y menos 9=21 é c)4x+18=10é d)3x+2=8 é e)10x menos 20=50 f)10=x+8

Answer 1

$a) 3x - 10 =x+6$
$3x = x+6+10$
$3x = 16x$
$x= \frac{16}{3}$
$x = 5,3$

$b) 2y - 9 = 21$
$2y=21+9$
$y= \frac{30}{2}$
$x=15$

$c) 4x+18=10$
$4x = 10 -18$
$4x = -8$
$x= \frac{-8}{4}$
$x = -2$

d)$3x+2=8$
$3x=8-2$
$3x=6$
$x= \frac{6}{3}$
$x=2$

e)$10x-20=50$
$10x= 50+20$
$x= \frac{70}{10}$
$x=7$

f)$10=x+8$
$10 - 8=x$
$2=x$