21+180-2a=a

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Solution for 21+180-2a=a equation:


Simplifying
21 + 180 + -2a = a

Combine like terms: 21 + 180 = 201
201 + -2a = a

Solving
201 + -2a = 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.
201 + -2a + -1a = a + -1a

Combine like terms: -2a + -1a = -3a
201 + -3a = a + -1a

Combine like terms: a + -1a = 0
201 + -3a = 0

Add '-201' to each side of the equation.
201 + -201 + -3a = 0 + -201

Combine like terms: 201 + -201 = 0
0 + -3a = 0 + -201
-3a = 0 + -201

Combine like terms: 0 + -201 = -201
-3a = -201

Divide each side by '-3'.
a = 67

Simplifying
a = 67

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