4y+21=2y-3

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Solution for 4y+21=2y-3 equation:


Simplifying
4y + 21 = 2y + -3

Reorder the terms:
21 + 4y = 2y + -3

Reorder the terms:
21 + 4y = -3 + 2y

Solving
21 + 4y = -3 + 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
21 + 4y + -2y = -3 + 2y + -2y

Combine like terms: 4y + -2y = 2y
21 + 2y = -3 + 2y + -2y

Combine like terms: 2y + -2y = 0
21 + 2y = -3 + 0
21 + 2y = -3

Add '-21' to each side of the equation.
21 + -21 + 2y = -3 + -21

Combine like terms: 21 + -21 = 0
0 + 2y = -3 + -21
2y = -3 + -21

Combine like terms: -3 + -21 = -24
2y = -24

Divide each side by '2'.
y = -12

Simplifying
y = -12

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