(6y+9)-(4y-9)=

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Solution for (6y+9)-(4y-9)= equation:


Simplifying
(6y + 9) + -1(4y + -9) = 0

Reorder the terms:
(9 + 6y) + -1(4y + -9) = 0

Remove parenthesis around (9 + 6y)
9 + 6y + -1(4y + -9) = 0

Reorder the terms:
9 + 6y + -1(-9 + 4y) = 0
9 + 6y + (-9 * -1 + 4y * -1) = 0
9 + 6y + (9 + -4y) = 0

Reorder the terms:
9 + 9 + 6y + -4y = 0

Combine like terms: 9 + 9 = 18
18 + 6y + -4y = 0

Combine like terms: 6y + -4y = 2y
18 + 2y = 0

Solving
18 + 2y = 0

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 + 2y = 0 + -18

Combine like terms: 18 + -18 = 0
0 + 2y = 0 + -18
2y = 0 + -18

Combine like terms: 0 + -18 = -18
2y = -18

Divide each side by '2'.
y = -9

Simplifying
y = -9

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