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If 
14y^(2)-21 x=a(2y^(2)-3x), where 
a is a constant, what is the value of 
a ?

If 14y221x=a(2y23x) 14 y^{2}-21 x=a\left(2 y^{2}-3 x\right) , where a a is a constant, what is the value of a a ?

Full solution

Q. If 14y221x=a(2y23x) 14 y^{2}-21 x=a\left(2 y^{2}-3 x\right) , where a a is a constant, what is the value of a a ?
  1. Given equation: We are given the equation 14y221x=a(2y23x)14y^2 - 21x = a(2y^2 - 3x). To find the value of aa, we need to compare the coefficients of corresponding terms on both sides of the equation.
  2. Comparing y2y^2 terms: First, let's compare the coefficients of the y2y^2 terms. On the left side, the coefficient of y2y^2 is 1414. On the right side, the coefficient of y2y^2 is 2a2a.\newlineSo we have 14=2a14 = 2a.
  3. Solving for a: Now, let's solve for a by dividing both sides of the equation by 22.\newline142=2a2\frac{14}{2} = \frac{2a}{2}\newline7=a7 = a
  4. Verifying with x x terms: Next, we should verify our result by comparing the coefficients of the x x terms. On the left side, the coefficient of x x is 21 -21 . On the right side, the coefficient of x x is 3a -3a .\newlineSo we have 21=3a -21 = -3a .
  5. Final value of a: Now, let's solve for a by dividing both sides of the equation by \(-3").\newline\(-21 / 3-3 = 3-3a / 3-3")\newline\(7 = a")
  6. Final value of a: Now, let's solve for a by dividing both sides of the equation by 3-3.\newline21/3=3a/3-21 / -3 = -3a / -3\newline7=a7 = a Since we found the same value for a when comparing both the y2y^2 and xx terms, we can conclude that the value of a is indeed 77.

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