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Simplifying
81c2 + -49d2 = 0
Solving
81c2 + -49d2 = 0
Solving for variable 'c'.
Move all terms containing c to the left, all other terms to the right.
Add '49d2' to each side of the equation.
81c2 + -49d2 + 49d2 = 0 + 49d2
Combine like terms: -49d2 + 49d2 = 0
81c2 + 0 = 0 + 49d2
81c2 = 0 + 49d2
Remove the zero:
81c2 = 49d2
Divide each side by '81'.
c2 = 0.6049382716d2
Simplifying
c2 = 0.6049382716d2
Take the square root of each side:
c = {-0.777777778d, 0.777777778d}
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