10y-[11(9-y)-21]=4y+3(6-5y)

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Solution for 10y-[11(9-y)-21]=4y+3(6-5y) equation:


Simplifying
10y + -1[11(9 + -1y) + -21] = 4y + 3(6 + -5y)
10y + -1[(9 * 11 + -1y * 11) + -21] = 4y + 3(6 + -5y)
10y + -1[(99 + -11y) + -21] = 4y + 3(6 + -5y)

Reorder the terms:
10y + -1[99 + -21 + -11y] = 4y + 3(6 + -5y)

Combine like terms: 99 + -21 = 78
10y + -1[78 + -11y] = 4y + 3(6 + -5y)
10y + [78 * -1 + -11y * -1] = 4y + 3(6 + -5y)
10y + [-78 + 11y] = 4y + 3(6 + -5y)

Reorder the terms:
-78 + 10y + 11y = 4y + 3(6 + -5y)

Combine like terms: 10y + 11y = 21y
-78 + 21y = 4y + 3(6 + -5y)
-78 + 21y = 4y + (6 * 3 + -5y * 3)
-78 + 21y = 4y + (18 + -15y)

Reorder the terms:
-78 + 21y = 18 + 4y + -15y

Combine like terms: 4y + -15y = -11y
-78 + 21y = 18 + -11y

Solving
-78 + 21y = 18 + -11y

Solving for variable 'y'.

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

Add '11y' to each side of the equation.
-78 + 21y + 11y = 18 + -11y + 11y

Combine like terms: 21y + 11y = 32y
-78 + 32y = 18 + -11y + 11y

Combine like terms: -11y + 11y = 0
-78 + 32y = 18 + 0
-78 + 32y = 18

Add '78' to each side of the equation.
-78 + 78 + 32y = 18 + 78

Combine like terms: -78 + 78 = 0
0 + 32y = 18 + 78
32y = 18 + 78

Combine like terms: 18 + 78 = 96
32y = 96

Divide each side by '32'.
y = 3

Simplifying
y = 3

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