1/3x+1/4y=21

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Solution for 1/3x+1/4y=21 equation: 


x in (-oo:+oo)

(1/3)*x+(1/4)*y = 21 // - 21

(1/3)*x+(1/4)*y-21 = 0

1/3*x+1/4*y-21 = 0 // - 1/4*y-21

1/3*x = -(1/4*y-21) // : 1/3

x = (-(1/4*y-21))/1/3

x = 3*(21-(1/4*y))

x = 3*(21-(1/4*y))

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