21y-9=-45

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Solution for 21y-9=-45 equation: 


Simplifying
21y + -9 = -45

Reorder the terms:
-9 + 21y = -45

Solving
-9 + 21y = -45

Solving for variable 'y'.

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

Add '9' to each side of the equation.
-9 + 9 + 21y = -45 + 9

Combine like terms: -9 + 9 = 0
0 + 21y = -45 + 9
21y = -45 + 9

Combine like terms: -45 + 9 = -36
21y = -36

Divide each side by '21'.
y = -1.714285714

Simplifying
y = -1.714285714

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