4a+5b=9a-15

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Solution for 4a+5b=9a-15 equation:


Simplifying
4a + 5b = 9a + -15

Reorder the terms:
4a + 5b = -15 + 9a

Solving
4a + 5b = -15 + 9a

Solving for variable 'a'.

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

Add '-9a' to each side of the equation.
4a + -9a + 5b = -15 + 9a + -9a

Combine like terms: 4a + -9a = -5a
-5a + 5b = -15 + 9a + -9a

Combine like terms: 9a + -9a = 0
-5a + 5b = -15 + 0
-5a + 5b = -15

Add '-5b' to each side of the equation.
-5a + 5b + -5b = -15 + -5b

Combine like terms: 5b + -5b = 0
-5a + 0 = -15 + -5b
-5a = -15 + -5b

Divide each side by '-5'.
a = 3 + b

Simplifying
a = 3 + b

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