Subtract from both sides:
Multiply both sides by :
Divide both sides by 4:
Answer:
Z = 4X / Y^2 + 3W
Z - 3W = 4X / Y^2
(Z - 3W) * Y^2 = 4X
1/4 * (Z - 3W) * Y^2 = X
X = 1/4 * (Z - 3W) * Y^2
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