7(5/21x-3/7)

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Solution for 7(5/21x-3/7) equation: 


x in (-oo:+oo)

7*((5/21)*x-(3/7)) = 0

7*((5/21)*x-3/7) = 0

7*(5/21*x-3/7) = 0

( 5/21*x-3/7 )

5/21*x-3/7 = 0 // + 3/7

5/21*x = 3/7 // : 5/21

x = 3/7/5/21

x = 9/5

( 7 )

7 = 0

x belongs to the empty set

x = 9/5

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