Question

Multiplique os sinais .
A)-5(-x-4)=-5
B)3(6x-8)+10=5(x-2)-(-4+3x)
C)3(6x-8)+10=5(x-2)-(-4+3x)
D)-(x-2)-2=2(x-5)+4x
E)6(x-3)-9(x-1)=5-(x+3)

Answer 1

A)-5(-x-4)=-5 ==> -5x + 20 = - 5 ==> 5x = -20-5==> 5x= - 25 ==> x = - 5

B)3(6x-8)+10=5(x-2)-(-4+3x)
     18x - 24 + 10 = 5x - 10 + 4 - 3x ==> 18x -5x + 3x = - 10+ 4 +24 - 10
     16x = 8 ==>x = 8/16

C)3(6x-8)+10=5(x-2)-(-4+3x)
     18x - 24 + 10 = 5x - 10 + 4 - 12x ==> 18x-5x+12x = -10+4+24-10
      25X = 8 ==> X = 8/25


D)-(x-2)-2=2(x-5)+4x
     - x + 2  = 2x - 10 + 4x
     4x + x + 2x = 2 + 10 ==> 7x = 12 ==> x= 12/7

E)6(x-3)-9(x-1)=5-(x+3)
    18x - 18 - 9x + 9 = 5 - x - 3  ==> 18x - 9x +x = 5 - 3 +18 - 9
      10x = 11 ==. x = 11/10