Question

Resolva as Equações de primeiro grau:

a) 16x -4 = 12x+28

b) 4+2(x+1)=14

c)3(2x-1)=21

d)3(x-2)=2(-x+2)

e)-3(2x+3)=-10x+11

Answer 1

Explicação passo-a-passo:

a) 16x -4 = 12x + 28

16x - 12x = 28 + 4

4x = 32

x = 32/4

x = 8

b) 4 +2 ( x + 1 ) = 14

4 + 2x + 2 = 14

2x = 14 - 6

2x = 8

x = 8/2

x = 4

c) 3(2x-1) = 21

2x - 1 = 7

2x = 7 + 1

2x = 8

x = 8/2

x = 4

d) 3( x-2 ) = 2(-x + 2 )

3x - 6 = -2x + 4

3x + 2x = 4 + 6

5x = 10

x = 10/5

x = 2

e) -3(2x+3) = -10x + 11

-6x - 9 = -10x + 11

-6x + 10x = 11 + 9

4x = 20

x= 20/4

x= 5