7x-9(-21-3x/7)=63

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Solution for 7x-9(-21-3x/7)=63 equation: 


x in (-oo:+oo)

7*x-(9*(-((3*x)/7)-21)) = 63 // - 63

7*x-(9*(-((3*x)/7)-21))-63 = 0

7*x-9*((-3/7)*x-21)-63 = 0

7*x-9*(-3/7*x-21)-63 = 0

7*x-9*(-3/7*x-21)-63 = 0

76/7*x-63+189 = 0

76/7*x+126 = 0

76/7*x+126 = 0

76/7*x+126 = 0 // - 126

76/7*x = -126 // : 76/7

x = -126/76/7

x = -441/38

x = -441/38

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