Question

resolva as equações 1 grau

a) 5x - 5 + x = 9 + x

b) - x - 5 + 4x = - 7x + 6x

c 13 + 4 ( 2x - 1 ) = 5 ( x + 2 )

D ) 4 ( x + 5 ) + 3 ( x + 5 ) = 21

e) 2 ( x + 5 ) - 3 ( 5 - x ) = 10

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Answer 1

Oi..

a)

5x - 5 + x = 9 + x

5x + x - x = 9 + 5

5x = 14

x = 14/5

b)

- x - 5 + 4x = - 7x + 6x

- x -5 + 4x = - x

-  x + 4x + x = 5

4x = 5

x = 5/4

c)

13 + 4(2x - 1) = 5(x + 2)

13 + 8x - 4 = 5x + 10

8x - 5x = 10 + 4 - 13

3x= 1

x = 1/3

d)

4(x + 5) + 3(x + 5) = 21

4x + 20 + 3x + 15 = 21

7x = 21 - 20 - 15

7x = -14

x = - 14/7

x = - 2

e)

2(x + 5) - 3(5 - x) = 10

2x + 10 - 15 + 3x = 10

5x = 10 + 15 - 10

5x = 15

x = 15/5

x = 3

Espero ter ajudado