2(9y-1)=99-21+28y

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Solution for 2(9y-1)=99-21+28y equation:


Simplifying
2(9y + -1) = 99 + -21 + 28y

Reorder the terms:
2(-1 + 9y) = 99 + -21 + 28y
(-1 * 2 + 9y * 2) = 99 + -21 + 28y
(-2 + 18y) = 99 + -21 + 28y

Combine like terms: 99 + -21 = 78
-2 + 18y = 78 + 28y

Solving
-2 + 18y = 78 + 28y

Solving for variable 'y'.

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

Add '-28y' to each side of the equation.
-2 + 18y + -28y = 78 + 28y + -28y

Combine like terms: 18y + -28y = -10y
-2 + -10y = 78 + 28y + -28y

Combine like terms: 28y + -28y = 0
-2 + -10y = 78 + 0
-2 + -10y = 78

Add '2' to each side of the equation.
-2 + 2 + -10y = 78 + 2

Combine like terms: -2 + 2 = 0
0 + -10y = 78 + 2
-10y = 78 + 2

Combine like terms: 78 + 2 = 80
-10y = 80

Divide each side by '-10'.
y = -8

Simplifying
y = -8

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