15a=6a-90

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Solution for 15a=6a-90 equation: 


Simplifying
15a = 6a + -90

Reorder the terms:
15a = -90 + 6a

Solving
15a = -90 + 6a

Solving for variable 'a'.

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

Add '-6a' to each side of the equation.
15a + -6a = -90 + 6a + -6a

Combine like terms: 15a + -6a = 9a
9a = -90 + 6a + -6a

Combine like terms: 6a + -6a = 0
9a = -90 + 0
9a = -90

Divide each side by '9'.
a = -10

Simplifying
a = -10

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