(7x+9)/10=-4

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Solution for (7x+9)/10=-4 equation: 


x in (-oo:+oo)

(7*x+9)/10 = -4 // + 4

(7*x+9)/10+4 = 0

(7*x+9)/10+(4*10)/10 = 0

7*x+4*10+9 = 0

7*x+49 = 0

(7*x+49)/10 = 0

(7*x+49)/10 = 0 // * 10

7*x+49 = 0

7*x+49 = 0 // - 49

7*x = -49 // : 7

x = -49/7

x = -7

x = -7

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