Question

01 Resolver as Equações do 1º grau

a 2y – 4 = 2

b 2 a + 4 = - 6 a

c - 2 + 5y = 13

d 5 – (4x + 2) = 8 + 2(x – 1)

e 3 – 2 (x + 3) = x – 18

f 50 + (3x − 4) = 2 (3x – 4) + 26​

Answer 1

a) 2y - 4 = 2

2y = 6

y = 3

b) 2a + 4 = - 6a

2a = -6a - 4

8a = -4

a = -4/8

a = -1/2

c) - 2 + 5y = 13

5y = 15

y = 3

d) 5 - (4x + 2) = 8 + 2(x - 1)

5 - (4x + 2) = 8 + 2x - 2

3 - 4x = 6 + 2x

3 = 6 + 6x

-3 = 6x

-3/6 = x

-1/2 = x

x = -1/2

e) 3 - 2 (x + 3) = x - 18

3 - 2x - 6 = x - 18

-2x - 6 = x - 21

-3x - 6 = -21

-3x = -15

3x = 15

x = 5

f) 50 + (3x - 4) = 2 (3x - 4) + 26

46 + 3x = 6x - 16 + 26

20 + 3x = 6x - 16

3x = 6x - 36

-3x = -36

3x = 36

x = 12

Espero ajudar. ^ ^