5/2x+3=7x+21

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Solution for 5/2x+3=7x+21 equation: 


x in (-oo:+oo)

(5/2)*x+3 = 7*x+21 // - 7*x+21

(5/2)*x-(7*x)-21+3 = 0

(5/2)*x-7*x-21+3 = 0

-9/2*x-18 = 0 // + 18

-9/2*x = 18 // : -9/2

x = 18/(-9/2)

x = -4

x = -4

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