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Simplifying
7y2 + -19 = 121
Reorder the terms:
-19 + 7y2 = 121
Solving
-19 + 7y2 = 121
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '19' to each side of the equation.
-19 + 19 + 7y2 = 121 + 19
Combine like terms: -19 + 19 = 0
0 + 7y2 = 121 + 19
7y2 = 121 + 19
Combine like terms: 121 + 19 = 140
7y2 = 140
Divide each side by '7'.
y2 = 20
Simplifying
y2 = 20
Take the square root of each side:
y = {-4.472135955, 4.472135955}
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