Question

resolva as equações de 1 grau com inconigta e números racionais:

A) 7x + 11 = 5x - 7

B) 2 (x+ 5 ) - 4 = 26

C) 3 (x+2)= 2 (x + 7)

D) 3 (x+ 3) - 1 = 2

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

F) 3 (3x + 8) -5x = x-3

Answer 1

A) 7x + 11 = 5x - 7

7x - 5x = -7 - 11
2x = -18
x = -18/2
x = -9


B) 2 (x + 5) - 4 = 26

2x + 10 - 4 = 26
2x = 26 - 10 + 4
2x = 20
x = 20/2
x = 10


C) 3 (x + 2) = 2 (x + 7)

3x + 6 = 2x + 14
3x - 2x = 14 - 6
x = 8


D) 3 (x + 3) - 1 = 2

3x + 9 - 1 = 2
3x = 2 - 9 + 1
3x = -6
x = -6/3
x = -2


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

6x - 9 + x = 5
6x + x = 5 + 9
7x = 14
x = 14/7
x = 2


F) 3 (3x + 8) - 5x = x - 3

9x + 24 - 5x = x - 3
9x - 5x - x = -3 - 24
3x = -27
x = -27/3
x = -9



☆Espero ter ajudado!