6y+21=4y-4

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Solution for 6y+21=4y-4 equation:


Simplifying
6y + 21 = 4y + -4

Reorder the terms:
21 + 6y = 4y + -4

Reorder the terms:
21 + 6y = -4 + 4y

Solving
21 + 6y = -4 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
21 + 6y + -4y = -4 + 4y + -4y

Combine like terms: 6y + -4y = 2y
21 + 2y = -4 + 4y + -4y

Combine like terms: 4y + -4y = 0
21 + 2y = -4 + 0
21 + 2y = -4

Add '-21' to each side of the equation.
21 + -21 + 2y = -4 + -21

Combine like terms: 21 + -21 = 0
0 + 2y = -4 + -21
2y = -4 + -21

Combine like terms: -4 + -21 = -25
2y = -25

Divide each side by '2'.
y = -12.5

Simplifying
y = -12.5

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