1/2(3x-21)=5x

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Solution for 1/2(3x-21)=5x equation: 


x in (-oo:+oo)

(1/2)*(3*x-21) = 5*x // - 5*x

(1/2)*(3*x-21)-(5*x) = 0

(1/2)*(3*x-21)-5*x = 0

1/2*(3*x-21)-5*x = 0

1/2*(3*x-21)-5*x = 0

-7/2*x-21/2 = 0

-7/2*x-21/2 = 0

-7/2*x-21/2 = 0 // + 21/2

-7/2*x = 21/2 // : -7/2

x = 21/2/(-7/2)

x = -3

x = -3

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