21y-(2y-3)=7(9-5y)-6(8-4y)

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Solution for 21y-(2y-3)=7(9-5y)-6(8-4y) equation:


Simplifying
21y + -1(2y + -3) = 7(9 + -5y) + -6(8 + -4y)

Reorder the terms:
21y + -1(-3 + 2y) = 7(9 + -5y) + -6(8 + -4y)
21y + (-3 * -1 + 2y * -1) = 7(9 + -5y) + -6(8 + -4y)
21y + (3 + -2y) = 7(9 + -5y) + -6(8 + -4y)

Reorder the terms:
3 + 21y + -2y = 7(9 + -5y) + -6(8 + -4y)

Combine like terms: 21y + -2y = 19y
3 + 19y = 7(9 + -5y) + -6(8 + -4y)
3 + 19y = (9 * 7 + -5y * 7) + -6(8 + -4y)
3 + 19y = (63 + -35y) + -6(8 + -4y)
3 + 19y = 63 + -35y + (8 * -6 + -4y * -6)
3 + 19y = 63 + -35y + (-48 + 24y)

Reorder the terms:
3 + 19y = 63 + -48 + -35y + 24y

Combine like terms: 63 + -48 = 15
3 + 19y = 15 + -35y + 24y

Combine like terms: -35y + 24y = -11y
3 + 19y = 15 + -11y

Solving
3 + 19y = 15 + -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.
3 + 19y + 11y = 15 + -11y + 11y

Combine like terms: 19y + 11y = 30y
3 + 30y = 15 + -11y + 11y

Combine like terms: -11y + 11y = 0
3 + 30y = 15 + 0
3 + 30y = 15

Add '-3' to each side of the equation.
3 + -3 + 30y = 15 + -3

Combine like terms: 3 + -3 = 0
0 + 30y = 15 + -3
30y = 15 + -3

Combine like terms: 15 + -3 = 12
30y = 12

Divide each side by '30'.
y = 0.4

Simplifying
y = 0.4

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