Question

Revisão equações do 1° grau
A) 4x=20
B)7×=-14
C)6×=10
D)15×=-19
E)-3×=9
F)-7×=-14
G)-6×=14
H)-5×-15
I)3×=1=8
J)-×+2=5
K)-2×+4=5
L)6x-1=9
M)5×+7=2×+13
N)4×-5=5×+1
O)2×+3=9-×
P)4×+11=7×+1​

Answer 1

Resposta:

A) 4x = 20

x = 20/4

x = 5

B) 7x = -14

x = 14/-7

x = -2

C) 6x = 10

x = 10/6

D) 15x = -19

x = -19/15

E) -3x = 9

x = 9/-3

x = -3

F) -7x = -14

x = -14/-7

x = 2

G) -6x = 14

x = -14/6

H) -5x = -15

x = -15/-5

x = 3

I) 3x = 1 + 8

3x = 9

x = 9/3

x = 3

J) -x + 2 = 5

-x = 5 - 2

-x = 3

x = 3/-1

x = -3

K) -2x + 4 = 5

-2x = 5 - 4

-2x = 1

x = 1/-2

L) 6x - 1 = 9

6x = 9 + 1

6x = 10

x = 10/6

M) 5x + 7 = 2x + 13

5x - 2x = 13 - 7

3x = 6

x = 6/3

x = 2

N) 4x - 5 = 5x + 1

4x - 5x = 1 + 5

-x = 6

x = 6/-1

x = -6

O) 2x + 3 = 9 - x

2x + x = 9 - 3

3x = 6

x = 6/3

x = 2

P) 4x + 11 = 7x + 1

4x - 7x = 1 - 11

-3x = -10

x = -10/-3