2/3x+5/3x=21

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Solution for 2/3x+5/3x=21 equation: 


x in (-oo:+oo)

(2/3)*x+(5/3)*x = 21 // - 21

(2/3)*x+(5/3)*x-21 = 0

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

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

x = 21/7/3

x = 9

x = 9

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