((7x-7)/(5x+5))*((6x+6)/(10x-10))

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Solution for ((7x-7)/(5x+5))*((6x+6)/(10x-10)) equation: 


D( x )

10*x-10 = 0

5*x+5 = 0

10*x-10 = 0

10*x-10 = 0

10*x-10 = 0 // + 10

10*x = 10 // : 10

x = 10/10

x = 1

5*x+5 = 0

5*x+5 = 0

5*x+5 = 0 // - 5

5*x = -5 // : 5

x = -5/5

x = -1

x in (-oo:-1) U (-1:1) U (1:+oo)

((7*x-7)/(5*x+5))*((6*x+6)/(10*x-10)) = 0

((7*x-7)*(6*x+6))/((5*x+5)*(10*x-10)) = 0

( 6*x+6 )

6*x+6 = 0 // - 6

6*x = -6 // : 6

x = -6/6

x = -1

( 7*x-7 )

7*x-7 = 0 // + 7

7*x = 7 // : 7

x = 7/7

x = 1

x in { -1} 

x in { 1} 

x belongs to the empty set

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