1) resolva as seguintes equações do 1° grau: a) 6x = 2x + 1f)...

a)

6x = 2x + 1

6x - 2x + 1

4x = 1

x = 1/4

f)

2x + 1 = 4x - 1

2x + 1 - 4x = -1

-2x + 1 = -1

-2x = -1 - 1

-2x = -2

x = -2/-2

x = 1

b)

2x - 5 = x + 1

2x - 5 - x = 1

x - 5 = 1

x = 1 + 5

x = 6

g)

4x - 10 = 2x + 2

4x - 10 - 2x = 2

2x - 10 = 2

2x = 2 + 10

2x = 12

x = 12/2

x = 6

c) 2x + 3 = x + 4

2x + 3 - x = 4

x + 3 = 4

x = 4 - 3

x = 1

h) 9x + 9 + 3x = 15

12x + 9 = 15

12x = 15 - 9

12x = 6

x = 6/12 ÷ 2

x = 1/2

i) 10x + 1 = 12x + 3

10x + 1 - 12x = 3

-2x + 1 = 3

-2x = 3 - 1

-2x = 2

x = 2/-2

x = -1

d) 5x + 7 = 4x + 10

5x + 7 - 4x = 10

x + 7 = 10

x = 10 - 7

x = 3

j) 3x - 2 = 4x + 9

3x - 2 - 4x + 9

-x - 2 = 9

-x = 9 + 2

-x = 11

x = -11

e) 4x - 7 = 8x - 2

4x - 7 - 8x = -2

-4x - 7 = -2

-4x = -2 + 7

-4x = 5

x = 5/-4