Question

Resolva : A) 5,2(4,3x - 4x)= 10x - 8
B) 2,3(x+8x - 1,5) =29
C)4(x+9) = 8
D) (12-5x-8) . 2= 12+8x
E) x(2 - 7)=10
F) y(6+9)= 5y -10
G) -x + 4= 5x -20
H)2x - 5= -x +2
I) 24x=48
J) x -1 =48
K)2x - 10 = -15 -3 x
L) 6(x +2) -4 =12
M) 8 (x-4) = 0

Answer 1

A) 5,2(4,3x - 4x)= 10x - 8
22,36x - 20,8x = 10x -8
22,36x - 20,8x - 10x = -8
-8,44x= -8
x = -8/-8,44
X = 0,94

B) 2,3(x+8x - 1,5) =29
2,3x + 18,4x - 1,53 = 29
20,7x = 29 + 1,53
20,7x = 30,53
X = 30,53/20,7
X = 1,47

C)4(x+9) = 8
4x + 36 = 8
4x = 8 - 36
4x = -28
X = -28/4
X = -7

D) (12-5x-8) . 2= 12+8x
24 - 10x - 16 = 12 + 8x
-10x - 8x = 12 - 24 + 16
-18x = 4
X = 4/ -18

E) x(2 - 7)=10
2x - 7x = 10
9x = 10
X = 10/9
X = 1,11...

F) y(6+9)= 5y -10
6y + 9y = 5y -10
15y = 5y - 10
15y -5y = -10
10y = -10
Y = -10/10
Y = -1

G) -x + 4= 5x -20
-x -5x = -20 - 4
-6x = -24
X = -24/-6
X = 4

H)2x - 5= -x +2
2x +x = 2 + 5
3x = 7
X = 7/3
X = 2,33...

I) 24x=48
X = 48/24
X = 2

J) x -1 =48
X = 48 + 1
X = 49

K)2x - 10 = -15 -3 x
2x + 3x = -15 + 10
5x = -5
X = -5/5
X = -1

L) 6(x +2) -4 =12
6x + 12 - 4 = 12
6x = 12 - 12 + 4
6x = 4
X = 4/6

M) 8 (x-4) = 0
8x - 32 = 0
8x = 32
X = 32/8
X = 4