Question

Resolva as equações.
A)x+2=10
B)x-6=-8
C)3x-21=0
D)6+x=6,4
E)0,5x-9=1,5
F)4x+3=-19
G)5x+2=2x-1
H)6-3x=10-4x
I)2(3x-5)=14


Cálculos e respostas pfvr

Answer 1

a) x=10-2
x=8

b) x=-8+6
x=-2

c) 3x=21
x=21/3
x=7

d)x= 6,4-6
x=0,4

e)0,5x=1,5+9
0,5x=10,5
x=10,5/0,5
x=21

f)4x=-19-3
4x=-22
x=-22/4
x= -5,5

g) 5x-2x=-1-2
3x=-3
x=-3/3
x=-1

h) -3x+4x=10-6
x=4

i) 6x-10=14
6x=14+10
6x=24
x=24/6
x=4



*(espero ter ajudado)*

Answer 2

A)
x + 2 = 10
x = 10 - 2
x = 8


B)
x - 6 = - 8
x = - 8 + 6
x = - 2


C)
3x - 21 = 0

$3x = 21 \\ x = \frac{21}{3} \\ x = 7$


D)
6 + x = 6,4
x = 6,4 - 6,0
x = 0,4


E)
0,5x - 9 = 1,5
$0.5x - 9 = 1.5 \\ 0.5x = 1.5 + 9.0 \\ 0.5x = 10.5 \\ x = \frac{10.5}{0.5} \\ x = 21$


F)
4x + 3 = - 19
4x = - 19 - 3
4x = - 22
$x = - \frac{22}{4} \\ x = - \frac{11}{2} \: \: \: ou \: \: \: \: x = 5.5$


G)
5x + 2 = 2x - 1
$5x - 2x = - 1 - 2 \\ 3x = - 3 \\ x = - \frac{3}{3} \\ x = - 1$


H)
6 - 3x = 10 - 4x
$- 3x + 4x= 10 - 6 \\ x = 4$


I)
2.(3x - 5) = 14
$6x - 10 = 14 \\ 6x = 14 + 10 \\ 6x = 24 \\ x = \frac{24}{6} \\ x = 4$


Espero ter ajudado

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