9+3a-4=a+20-15

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Solution for 9+3a-4=a+20-15 equation:


Simplifying
9 + 3a + -4 = a + 20 + -15

Reorder the terms:
9 + -4 + 3a = a + 20 + -15

Combine like terms: 9 + -4 = 5
5 + 3a = a + 20 + -15

Reorder the terms:
5 + 3a = 20 + -15 + a

Combine like terms: 20 + -15 = 5
5 + 3a = 5 + a

Add '-5' to each side of the equation.
5 + -5 + 3a = 5 + -5 + a

Combine like terms: 5 + -5 = 0
0 + 3a = 5 + -5 + a
3a = 5 + -5 + a

Combine like terms: 5 + -5 = 0
3a = 0 + a
3a = a

Solving
3a = a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
3a + -1a = a + -1a

Combine like terms: 3a + -1a = 2a
2a = a + -1a

Combine like terms: a + -1a = 0
2a = 0

Divide each side by '2'.
a = 0

Simplifying
a = 0

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