Question

a)2(x-4)=x+4
b) 2x+5+=7-6x
c) 18x+4=2(5x+9)

Answer 1

A) 2(X-4) = X+4
     2X-8 = X + 4
    2X-X = 8+4
     X = 12

B) 2X+5X = 7-6X
    7X+6X = 7
    13X = 7
      X = 7/13
      X= 0,5384615385

C) 18X+4 = 2(5X+9)
     18X+4 = 10X+18
     18X - 10X = 18-4
     8X = 14
       X = 14/8
      X= 1,75

Answer 2

A) 2x-8 = x+4 / 2x- x = 4+8 / x=12                  
B) 2x+5 =7 -6x / 2x+ 6x= 7-5 / 8x= 2 x = 2/4 = x= 1/2 ou x=0,5  
C) 18x +4 = 10x + 18 / 18x- 10x = 18-4 / 8x= 14 /x = 14/8 / x=7/4