Question

Resolva as equações:

a) -4x = 20

b)2x - 1 = x - 10

c)2(4x - 7) = 5 + 3(x + 2)

d) 4x - 4= 12

e)7x - 14 = 35

f)4x - 13 = 12

g) -5x + 6= 1

h) 4+ (3x - 2) = 2 (x- 7)

i)11x= -9

j)-11+3x + 7 = 2x - 10

k)5x + 11 = 11

l) 5(4x -2) = 2(x- 7)​

Answer 1

Respostas:

A) x=−5

B) x=−9

C) x=5

D) x=4

E) x=7

F) x= 25/4  

G) x=1

H) x=−16

I) x=− 9/11

J) x=−6

K) x=0

I) x=- 2/9

Answer 2

Resposta:

Explicação passo-a-passo:

a) -4x = 20(-1)

4X=-20

X-20/4=-5

 

b)2x - 1 = x - 10

2x-x=-10+1

x=-9

c)2(4x - 7) = 5 + 3(x + 2)

8x-14=5+3x+6

8x-3x=5+6+14

5x=25

x=25/5=5

d) 4x - 4= 12

4x=12+4

4x=16

x=16/4=4

e)7x - 14 = 35

7x=35+14

7x=49

x=49/7=7

f)4x - 13 = 12

4x=12+13

4x=25

x=25/4

g) -5x + 6= 1

-5x=1-6

-5x=-5*(-1)

5x=5

x=5/5=1

h) 4+ (3x - 2) = 2 (x- 7)

4+3x-2=2x-7

+3x-2x=-7+2-4

x=-1

i)11x= -9

x=9/11

j)-11+3x + 7 = 2x - 10

3x-2x=-10-7+11

x=-6

k)5x + 11 = 11

5x=11-11

5x=0

x=0/5=0

l) 5(4x -2) = 2(x- 7)​

20x-10=2x-14

20x-2x=-14+10

18x=4

x=4/18

x=2/9