Question

PFV ME AJUDAAAA

a) 4× + 18 = 2× + 28

b)25× = 25

c)50× = 25

d)3× = 40 + 2× - 7 + 5× - 22

e)23 - 8y - 15 = - 2y + 26

f)7× - 3× = 70 - 30

g)9y - 25 + y = 32 + 3y - 1

h)29 + 13b + 5b = 11

i)x + x + x + 30 = 2× + 3× + 4×

j)7a + 35 - 2a - 19 = 5a + 26 - 4a + 20 - 6a​

Answer 1

Resposta:

a) 4x + 18 = 2x + 28

4x - 2x = 28 - 18

2x = 10

x = 10/2

x = 5

b) 25x = 25

x = 25/25

x = 1

c) 50x = 25

x = 25/50

x = 0,5

d) 3x = 40 + 2x - 7 + 5x - 22

3x - 2x - 5x = 40 - 7 - 22

- 4x = 40 - 7 - 22

- 4x = 11

x = -11/4

x = -2,75

e)23 - 8y - 15 = - 2y + 26

-8y + 2y = 26 - 23 + 15

-6y = 18

y = -18/6

y = -3

 

f)7× - 3× = 70 - 30

4x = 40

x = 40/4

x = 10

g)9y - 25 + y = 32 + 3y - 1

9y + y -3y = 32 - 1 + 25

7y = 56

y = 56/7

y = 8

h)29 + 13b + 5b = 11

18b = 11 - 29

18b = -18

b = -18/18

b = -1

i)x + x + x + 30 = 2× + 3× + 4×

3x - 2x - 3x - 4x = -30

-6x = -30

x = -30/-6

x = 30/6

x = 5

j)7a + 35 - 2a - 19 = 5a + 26 - 4a + 20 - 6a​

7a - 2a - 5a + 4a + 6a = 26 + 20 - 35 + 19

10a = 30

a = 30/10

a = 3

ESPERO TER AJUDADO!!! <3

BONS ESTUDOS!!! :D