4y-3=-21

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Solution for 4y-3=-21 equation: 


Simplifying
4y + -3 = -21

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

Solving
-3 + 4y = -21

Solving for variable 'y'.

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

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

Combine like terms: -3 + 3 = 0
0 + 4y = -21 + 3
4y = -21 + 3

Combine like terms: -21 + 3 = -18
4y = -18

Divide each side by '4'.
y = -4.5

Simplifying
y = -4.5

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