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Simplifying
64 + -9d2 = 7
Solving
64 + -9d2 = 7
Solving for variable 'd'.
Move all terms containing d to the left, all other terms to the right.
Add '-64' to each side of the equation.
64 + -64 + -9d2 = 7 + -64
Combine like terms: 64 + -64 = 0
0 + -9d2 = 7 + -64
-9d2 = 7 + -64
Combine like terms: 7 + -64 = -57
-9d2 = -57
Divide each side by '-9'.
d2 = 6.333333333
Simplifying
d2 = 6.333333333
Take the square root of each side:
d = {-2.516611478, 2.516611478}
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