(3y+9)2=81

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Solution for (3y+9)2=81 equation:


Simplifying
(3y + 9) * 2 = 81

Reorder the terms:
(9 + 3y) * 2 = 81

Reorder the terms for easier multiplication:
2(9 + 3y) = 81
(9 * 2 + 3y * 2) = 81
(18 + 6y) = 81

Solving
18 + 6y = 81

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-18' to each side of the equation.
18 + -18 + 6y = 81 + -18

Combine like terms: 18 + -18 = 0
0 + 6y = 81 + -18
6y = 81 + -18

Combine like terms: 81 + -18 = 63
6y = 63

Divide each side by '6'.
y = 10.5

Simplifying
y = 10.5

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