Question

Equações de 1 grau:
A ) 3x -1 = 8
B ) -10x +2= -8
C ) -10x +2= -8
D ) -9x -7= -11
E ) 7x -3 =4
F ) -10x -2 =18
G ) 25x -1 = 49
H ) 17x -3 =-20
I ) -x +8 =-1
J ) -x -5 =25

Alguém me ajuda??

Answer 1

A ) 3x -1 = 8 => 3x = 8 + 1 => x = 9/3 => x = 3

B ) -10x +2= -8 => - 10x = - 8 - 2 => x = - 10/ - 10 => x = 1

C ) -10x +2= -8 => - 10x = - 8 - 2 => x = - 10/ - 10 => x = 1

D ) -9x -7= -11 => -9x = - 11 + 7 => x = - 4/- 9 => x = 4/9

E ) 7x -3 =4 => 7x = 4 + 3 => x = 7/7 => x = 1

F ) -10x -2 =18 => - 10x = 18 + 2 => x = 20/ -10 => x = -2

G ) 25x -1 = 49 => 25x = 49 + 1 => x = 50/25 => x = 2

H ) 17x -3 =-20 => 17x = - 20 + 3 => x = - 17/ 17 => x = - 1

I ) -x +8 =-1 +. - x = -1 - 8 => x = 9

J ) -x -5 =25 => - x = 25 + 5 => x = - 30