Question

1) sendo U=Q, resolva as equações do 1°grau:
A) 5.(x+2)=x+3.(x-4)

B)2x-(x+1)=-x

C)9x-23=13x-27

Answer 1

1) sendo U=Q, resolva as equações do 1°grau:

A) 5.(x+2)=x+3.(x-4)

5x + 10 = x + 3x - 12

5x - x - 3x = - 12 - 10

4x - 3x = - 22

x= - 22

B)2x-(x+1)=-x

2x - x - 1 = - x

2x -x + x = 1

x + x = 1

2x = 1

x= 1/2

C)9x-23=13x-27

9x - 13x = - 27 + 23

- 4x = - 4

x= - 4/-4

x= 1