Question

determinar o valor de x nas seguintes equações:

a) x+2=6
b) 3x+4=6x-10
c) 3(x+6)=4(-3+6x)
d) 7x+6=4x+2
e) 3(-3x+6)=4(-4x)-6
F) 7x+6=12(-2x+4)
G) 3(-7x+6)=4x-6
H) -3 (-3x+6)=-(-6x+7)
I) -6(-7x+6)=16(-7x-7)
J) 3(-7x+6)=-3x-4
L) 7x+6=4x+2
M) 7+6x=-4x+6
N) 3x-6=12.(-7x+4)
O) 7(x+4)=3(-3x+6)
P) 3x+2=6
Q) 7x+2=6
R) 3x+6=7x+6

Answer 1

a)x+2=6
x=6-2 x=4
b) 3x+4=6x-10
3x-6x=-10-4 -3x=-14 *(-1)
3x=14 x=14/3
c) 3(x+6)=4(-3+6x)
3x+18=-12+24x
3x-24x=-12-18 -21x=-30 *(-1)
21x=30 x=30/21 x=10/7
d) 7x+6=4x+2
7x-4x=2-6 3x=-4 x=-4/3
e) 3(-3x+6)=4(-4x)-6
-9x+18=-16x-6
-9x+16x=-6-18 7x=-24
x=-24/7
F) 7x+6=12(-2x+4)
7x+6=12(-2x+4)
7x+6=-24x+48
7x+24x=48-6 31x=42
x=42/31
O resto é com você! kkk

Answer 2

Olá,

Vamos lá,

a) x+2=6
x = 6 - 2
x = 4

b) 3x+4=6x-10
3x - 6x = -10 - 4
-3x = -14     * (-1)
3x=14
x = 14/3


c) 3(x+6)=4(-3+6x)
3x + 18= -12 + 24x
3x - 24x = -12 - 18
-21x = -30    *(-1)
21x = 30
x = 30/21
x = 10/7



d) 7x+6=4x+2
7x - 4x = 2 - 6
3x = -4
x = - 4/3


e) 3(-3x+6)=4(-4x)-6
-9x+18=-16x-24
-9x +16x=-24-18
7x= -42
x = -42/7
x= -6

F) 7x+6=12(-2x+4)
7x+6=-24x+48
7x+24x=48-6
31x = 42
x = 42/31


G) 3(-7x+6)=4x-6
-21x + 18 = 4x -6
-21x - 4x =-6-18
-25x= - 24
x = 24/25

H) -3 (-3x+6)=-(-6x+7)
9x - 18 = 6x - 7
9x - 6x = -7 + 18
3x = 11
x = 11/3


I) -6(-7x+6)=16(-7x-7)
42x - 36 = -112x - 112
42x + 112x = -112 + 36
154x = -76
x = -76/154
x = - 38/77

J) 3(-7x+6)=-3x-4
-21x +18 = -3x - 4
-21x + 3x= -4 -18
-18x = -22  *(-1)
18x = 22
x = 22/18
x = 11/9

L) 7x+6=4x+2
7x - 4x = 2 - 6
3x = -4
x = -4/3

M) 7+6x=-4x+6
6x + 4x = 6 - 7
10x = -1
x = -1/10

N) 3x-6=12.(-7x+4)
3x - 6 = -84x + 48
3x + 84x = 48 +6
87x = 54
x = 54/87
x = 18/29

O) 7(x+4)=3(-3x+6)
7x + 28 = -9x + 18
7x + 9x = 18 - 28
16x= -10
x = -10/16
x = -5/8

P) 3x+2=6
3x = 6 -2
3x = 4
x = 4/3

Q) 7x+2=6
7x = 6 - 2
7x = 4
x = 4/7

R) 3x+6=7x+6
3x - 7x = 6 - 6
-4x = 0
x =0