-4y-9=-2y-21

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Solution for -4y-9=-2y-21 equation:


Simplifying
-4y + -9 = -2y + -21

Reorder the terms:
-9 + -4y = -2y + -21

Reorder the terms:
-9 + -4y = -21 + -2y

Solving
-9 + -4y = -21 + -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.
-9 + -4y + 2y = -21 + -2y + 2y

Combine like terms: -4y + 2y = -2y
-9 + -2y = -21 + -2y + 2y

Combine like terms: -2y + 2y = 0
-9 + -2y = -21 + 0
-9 + -2y = -21

Add '9' to each side of the equation.
-9 + 9 + -2y = -21 + 9

Combine like terms: -9 + 9 = 0
0 + -2y = -21 + 9
-2y = -21 + 9

Combine like terms: -21 + 9 = -12
-2y = -12

Divide each side by '-2'.
y = 6

Simplifying
y = 6

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