Question

- Resolva as seguintes equações: (4,0)
a) x + 14 = 29
b)x - 8 = 11)
c) 2x + 3 = 17
d) 2x - 19 = 7
e)7x-9=26
f)3x +7=x +3
g)8x - 3=5x + 21
h)5x+2= 4 x- 2
i)2(y-1)= -y+19
j)4.(2x-1)=2(x+16)​

Answer 1

Resposta:

a) x = 15

b) x = 19

c) x = 7

d) x = 13

e) x = 7

f) x = -2

g) x = 8

h) x = -4

i) x = 7

j) x= 6

Explicação passo-a-passo:

a)

x + 14 = 29

x = 29 - 14

x = 15

b)

x - 8 = 11

x = 11 + 8

x = 19

c)

2x + 3 = 17

2x = 17 - 3

x = 14 / 2

x = 7

d)

2x - 19 = 7

2x = 7 + 19

x = 26 / 2

x = 13

e)

7x-9=26

7x = 26 + 9

7x = 35

x = 7

f)

3x +7=x +3

3x - x = 3 - 7

2x = -4

x = -4/2

x = -2

g)

8x - 3=5x + 21

8x - 5x = 21 + 3

3x = 24

x = 24/3

x = 8

h)

5x+2= 4 x- 2

5x - 4x = - 2 - 2

x = -4

i)

2(y-1)= -y+19

2y - 2 = -y + 19

2y + y = 19 + 2

3y = 21

y = 21/3

y = 7

j)

4.(2x-1)=2(x+16)

8x - 4 = 2x + 32

8x - 2x = 32 + 4

6x = 36

x = 36/6

x = 6