21-[4-8y-3(y+4)]=-3(2y-6)-[9(y-1)-7y+13]

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Solution for 21-[4-8y-3(y+4)]=-3(2y-6)-[9(y-1)-7y+13] equation:


Simplifying
21 + -1[4 + -8y + -3(y + 4)] = -3(2y + -6) + -1[9(y + -1) + -7y + 13]

Reorder the terms:
21 + -1[4 + -8y + -3(4 + y)] = -3(2y + -6) + -1[9(y + -1) + -7y + 13]
21 + -1[4 + -8y + (4 * -3 + y * -3)] = -3(2y + -6) + -1[9(y + -1) + -7y + 13]
21 + -1[4 + -8y + (-12 + -3y)] = -3(2y + -6) + -1[9(y + -1) + -7y + 13]

Reorder the terms:
21 + -1[4 + -12 + -8y + -3y] = -3(2y + -6) + -1[9(y + -1) + -7y + 13]

Combine like terms: 4 + -12 = -8
21 + -1[-8 + -8y + -3y] = -3(2y + -6) + -1[9(y + -1) + -7y + 13]

Combine like terms: -8y + -3y = -11y
21 + -1[-8 + -11y] = -3(2y + -6) + -1[9(y + -1) + -7y + 13]
21 + [-8 * -1 + -11y * -1] = -3(2y + -6) + -1[9(y + -1) + -7y + 13]
21 + [8 + 11y] = -3(2y + -6) + -1[9(y + -1) + -7y + 13]

Combine like terms: 21 + 8 = 29
29 + 11y = -3(2y + -6) + -1[9(y + -1) + -7y + 13]

Reorder the terms:
29 + 11y = -3(-6 + 2y) + -1[9(y + -1) + -7y + 13]
29 + 11y = (-6 * -3 + 2y * -3) + -1[9(y + -1) + -7y + 13]
29 + 11y = (18 + -6y) + -1[9(y + -1) + -7y + 13]

Reorder the terms:
29 + 11y = 18 + -6y + -1[9(-1 + y) + -7y + 13]
29 + 11y = 18 + -6y + -1[(-1 * 9 + y * 9) + -7y + 13]
29 + 11y = 18 + -6y + -1[(-9 + 9y) + -7y + 13]

Reorder the terms:
29 + 11y = 18 + -6y + -1[-9 + 13 + 9y + -7y]

Combine like terms: -9 + 13 = 4
29 + 11y = 18 + -6y + -1[4 + 9y + -7y]

Combine like terms: 9y + -7y = 2y
29 + 11y = 18 + -6y + -1[4 + 2y]
29 + 11y = 18 + -6y + [4 * -1 + 2y * -1]
29 + 11y = 18 + -6y + [-4 + -2y]

Reorder the terms:
29 + 11y = 18 + -4 + -6y + -2y

Combine like terms: 18 + -4 = 14
29 + 11y = 14 + -6y + -2y

Combine like terms: -6y + -2y = -8y
29 + 11y = 14 + -8y

Solving
29 + 11y = 14 + -8y

Solving for variable 'y'.

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

Add '8y' to each side of the equation.
29 + 11y + 8y = 14 + -8y + 8y

Combine like terms: 11y + 8y = 19y
29 + 19y = 14 + -8y + 8y

Combine like terms: -8y + 8y = 0
29 + 19y = 14 + 0
29 + 19y = 14

Add '-29' to each side of the equation.
29 + -29 + 19y = 14 + -29

Combine like terms: 29 + -29 = 0
0 + 19y = 14 + -29
19y = 14 + -29

Combine like terms: 14 + -29 = -15
19y = -15

Divide each side by '19'.
y = -0.7894736842

Simplifying
y = -0.7894736842

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