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Simplifying
169 = y2
Solving
169 = y2
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '-1y2' to each side of the equation.
169 + -1y2 = y2 + -1y2
Combine like terms: y2 + -1y2 = 0
169 + -1y2 = 0
Add '-169' to each side of the equation.
169 + -169 + -1y2 = 0 + -169
Combine like terms: 169 + -169 = 0
0 + -1y2 = 0 + -169
-1y2 = 0 + -169
Combine like terms: 0 + -169 = -169
-1y2 = -169
Divide each side by '-1'.
y2 = 169
Simplifying
y2 = 169
Take the square root of each side:
y = {-13, 13}
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