Question

EXERCÍCIO
1) Resolva as equações do 1º Grau:
a) 2x + 6 = 0
b) 3x + 5 = 11
c) 10x - 4 = 16
d) 2x - 7 = -5
e) 4x = 16
f) 8x + 3 = 2x - 9
g) 10x - 4 = 6x + 8
h) 5x – 4 = 3x + 8
i) 3x = - 12
j) 2x = - 10

Answer 1

a) 2x + 6 = 0

2x = 0 - 6

2x = - 6

x = -6/2

x = - 3

b) 3x + 5 = 11

3x = 11 - 5

3x = 6

x = 6/3

x = 2

c) 10x - 4 = 16

10x = 16 + 4

10x = 20

x = 20/10

x = 2

d) 2x - 7 = -5

2x = -5 + 7

2x = 2

x = 2/2

x = 1

e) 4x = 16

x = 16/4

x = 4

f) 8x + 3 = 2x - 9

8x - 2x = -9 - 3

6x = -12

x = -12/6

x = -2

g) 10x - 4 = 6x + 8

10x - 6x = 8 + 4

4x = 12

x = 12/4

x = 3

h) 5x – 4 = 3x + 8

5x - 3x = 8 + 4

2x = 12

x = 12/2

x = 6

i) 3x = - 12

x = -12/3

x = -4

j) 2x = - 10

x = -10/2

x = -5

Espero ter ajudado!