Question

a ) 7 ( x - 5 ) = ( x + 1 )


b) 3 ( x-2 ) = 4 ( - x + 3 )


c) 2 ( x+ 1 ) - ( x - 1 ) = 0 

Answer 1

a ) 7( x - 5 ) = ( x + 1 )
7x - 35 = x + 1
7x - x = 1 + 35
6x = 36
x = 36/6
x = 6

S[6]


b) 3( x-2 ) = 4 ( - x + 3 )
3x - 6 = - 4x + 12
3x + 7x = 12 + 6
10x = 18
    x = 18  ÷  2
          10  ÷  2

   x= 9
        5


S[9/5]


c) 2( x+ 1 ) - ( x - 1 ) = 0 
2x + 2 - x + 1 = 0
2x - x = - 2 - 1
x = - 3

S[- 3]