7-9[7-(9y+9)]=

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Solution for 7-9[7-(9y+9)]= equation:


Simplifying
7 + -9[7 + -1(9y + 9)] = 0

Reorder the terms:
7 + -9[7 + -1(9 + 9y)] = 0
7 + -9[7 + (9 * -1 + 9y * -1)] = 0
7 + -9[7 + (-9 + -9y)] = 0

Combine like terms: 7 + -9 = -2
7 + -9[-2 + -9y] = 0
7 + [-2 * -9 + -9y * -9] = 0
7 + [18 + 81y] = 0

Combine like terms: 7 + 18 = 25
25 + 81y = 0

Solving
25 + 81y = 0

Solving for variable 'y'.

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

Add '-25' to each side of the equation.
25 + -25 + 81y = 0 + -25

Combine like terms: 25 + -25 = 0
0 + 81y = 0 + -25
81y = 0 + -25

Combine like terms: 0 + -25 = -25
81y = -25

Divide each side by '81'.
y = -0.3086419753

Simplifying
y = -0.3086419753

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