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Simplifying
9y2 + -8 = 18
Reorder the terms:
-8 + 9y2 = 18
Solving
-8 + 9y2 = 18
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '8' to each side of the equation.
-8 + 8 + 9y2 = 18 + 8
Combine like terms: -8 + 8 = 0
0 + 9y2 = 18 + 8
9y2 = 18 + 8
Combine like terms: 18 + 8 = 26
9y2 = 26
Divide each side by '9'.
y2 = 2.888888889
Simplifying
y2 = 2.888888889
Take the square root of each side:
y = {-1.699673171, 1.699673171}
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