Question

1 Resolva as seguintes equações

a) 2x+4.(x-2) = 36

b)7x+3=52

c) 8-p-2 (p+4)=40

d) 7x +7=21

ME AJUDEMM PLISS​

Answer 1

Resposta:

Olá!

a) 2x+4.(x-2) = 36

2x + 4x - 8 = 36

6x - 8 = 36

6x = 36 + 8

6x = 44

x = 44/6

x = 22/3

S = {22/3}

b)7x+3=52

7x + 3 = 52

7x = 52 - 3

7x = 49

x = 49/7

x = 7

S = {7}

c) 8-p-2 (p+4)=40

8 - p - 2p - 8 = 40

Cancele o 8

-p - 2p = 40

-3p = 40

p = -40/3

S = {-40/3}

d) 7x +7=21

7x = 21 - 7

7x = 14

x = 14/7

x = 2

S = {2}