15a=16a-90

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Solution for 15a=16a-90 equation: 


Simplifying
15a = 16a + -90

Reorder the terms:
15a = -90 + 16a

Solving
15a = -90 + 16a

Solving for variable 'a'.

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

Add '-16a' to each side of the equation.
15a + -16a = -90 + 16a + -16a

Combine like terms: 15a + -16a = -1a
-1a = -90 + 16a + -16a

Combine like terms: 16a + -16a = 0
-1a = -90 + 0
-1a = -90

Divide each side by '-1'.
a = 90

Simplifying
a = 90

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