2a+20=3a-9

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Solution for 2a+20=3a-9 equation:


Simplifying
2a + 20 = 3a + -9

Reorder the terms:
20 + 2a = 3a + -9

Reorder the terms:
20 + 2a = -9 + 3a

Solving
20 + 2a = -9 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
20 + 2a + -3a = -9 + 3a + -3a

Combine like terms: 2a + -3a = -1a
20 + -1a = -9 + 3a + -3a

Combine like terms: 3a + -3a = 0
20 + -1a = -9 + 0
20 + -1a = -9

Add '-20' to each side of the equation.
20 + -20 + -1a = -9 + -20

Combine like terms: 20 + -20 = 0
0 + -1a = -9 + -20
-1a = -9 + -20

Combine like terms: -9 + -20 = -29
-1a = -29

Divide each side by '-1'.
a = 29

Simplifying
a = 29

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