Question

Resolva as equações

a)
$0 = x + 12$
b)
$- 3 = x + 10$
c)
$6x - 4 = 2x + 8$
d)
$17x - 2 + 4 = 10 + 5x$
e)
$4x - 10 = 2x + 2$
f)
$5x + 6x - 16 = 3x + 2x - 4$
g)
$5(2x - 4) = 7(x + 1) - 3$
h)
$4(x + 3) = 1$

Answer 1

a)0=x+12
-x=12-0
-x=+12(.-1)
x=-12

b)-3= x +10
-x=+10+3
-x=+13
x=-13


c) 6x-4= 2x+8
6x-2x=+8+4
4x=12
x=12/4
x=3


d)17x+2+4=+10-5x
17x+5x=+10-2-4
22x=+4
x=4/22 ou 5,5

e)4x-10=2x+2
4x-2x=2+10
2x=12
x=12/2
x=6

f)5x+6x-16=3x+2x-4
5x+6x+-3x-2x=-4+16
6x=12
x=12/6
x=2


g)5(2x-4)=7(x+1)-3
10x-20=7x+7-3
10x-7x=+7-3+20
3x=+24
x=24/3
x=8



h)4(x+3)=1
4x+12=1
4x=1-12
4x=-11
x=-11/4 ou -2,75