21y-3=-6

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Solution for 21y-3=-6 equation: 


Simplifying
21y + -3 = -6

Reorder the terms:
-3 + 21y = -6

Solving
-3 + 21y = -6

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 + 21y = -6 + 3

Combine like terms: -3 + 3 = 0
0 + 21y = -6 + 3
21y = -6 + 3

Combine like terms: -6 + 3 = -3
21y = -3

Divide each side by '21'.
y = -0.1428571429

Simplifying
y = -0.1428571429

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