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Simplifying
3y2 + -4 = 15
Reorder the terms:
-4 + 3y2 = 15
Solving
-4 + 3y2 = 15
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '4' to each side of the equation.
-4 + 4 + 3y2 = 15 + 4
Combine like terms: -4 + 4 = 0
0 + 3y2 = 15 + 4
3y2 = 15 + 4
Combine like terms: 15 + 4 = 19
3y2 = 19
Divide each side by '3'.
y2 = 6.333333333
Simplifying
y2 = 6.333333333
Take the square root of each side:
y = {-2.516611478, 2.516611478}
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