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Simplifying
(Y2 + -4) = 45
Reorder the terms:
(-4 + Y2) = 45
Remove parenthesis around (-4 + Y2)
-4 + Y2 = 45
Solving
-4 + Y2 = 45
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 + Y2 = 45 + 4
Combine like terms: -4 + 4 = 0
0 + Y2 = 45 + 4
Y2 = 45 + 4
Combine like terms: 45 + 4 = 49
Y2 = 49
Simplifying
Y2 = 49
Take the square root of each side:
Y = {-7, 7}
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