(7x+20)/9=-4

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Solution for (7x+20)/9=-4 equation: 


x in (-oo:+oo)

(7*x+20)/9 = -4 // + 4

(7*x+20)/9+4 = 0

(7*x+20)/9+(4*9)/9 = 0

7*x+4*9+20 = 0

7*x+56 = 0

(7*x+56)/9 = 0

(7*x+56)/9 = 0 // * 9

7*x+56 = 0

7*x+56 = 0 // - 56

7*x = -56 // : 7

x = -56/7

x = -8

x = -8

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