Question

Por favor me ajuda a resolver essas equações de 1° grau

 

A) -2x+3=6                    B)2x-1=9                C)4x-10=2x-30

 

 

 

 

 

E)-8x-12=2x-6 

Answer 1

A) -2x+3=6 
-2x = 3
x = -3/2
B)2x-1=9   
2x = 10
x = 5
C)4x-10=2x-30
2x = -20
x = -10
D)-8x-12=2x-6 
-10x = 6
x = -3/5

Answer 2

A) -2x+3=6  
-2x = 6-3
-2x = 3.(-1)
2x = -3
x = -3/2

B)2x-1=9
2x = 9+1
2x = 10
x = 10/2
x = 5

C)4x-10=2x-30
4x -2x = -30 +10
2x = -20
x = -20/2
x = -10

E)-8x-12=2x-6 
-8x -2x = -6 +12
-10x = +6.(-1)
10x = -6
x = -6/10       simplificando -6 e 10 por 2
x = -3/5