9+3a=5a+20-15

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Solution for 9+3a=5a+20-15 equation:


Simplifying
9 + 3a = 5a + 20 + -15

Reorder the terms:
9 + 3a = 20 + -15 + 5a

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

Solving
9 + 3a = 5 + 5a

Solving for variable 'a'.

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

Add '-5a' to each side of the equation.
9 + 3a + -5a = 5 + 5a + -5a

Combine like terms: 3a + -5a = -2a
9 + -2a = 5 + 5a + -5a

Combine like terms: 5a + -5a = 0
9 + -2a = 5 + 0
9 + -2a = 5

Add '-9' to each side of the equation.
9 + -9 + -2a = 5 + -9

Combine like terms: 9 + -9 = 0
0 + -2a = 5 + -9
-2a = 5 + -9

Combine like terms: 5 + -9 = -4
-2a = -4

Divide each side by '-2'.
a = 2

Simplifying
a = 2

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