a-21+a=a+47

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Solution for a-21+a=a+47 equation:


Simplifying
a + -21 + a = a + 47

Reorder the terms:
-21 + a + a = a + 47

Combine like terms: a + a = 2a
-21 + 2a = a + 47

Reorder the terms:
-21 + 2a = 47 + a

Solving
-21 + 2a = 47 + 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.
-21 + 2a + -1a = 47 + a + -1a

Combine like terms: 2a + -1a = 1a
-21 + 1a = 47 + a + -1a

Combine like terms: a + -1a = 0
-21 + 1a = 47 + 0
-21 + 1a = 47

Add '21' to each side of the equation.
-21 + 21 + 1a = 47 + 21

Combine like terms: -21 + 21 = 0
0 + 1a = 47 + 21
1a = 47 + 21

Combine like terms: 47 + 21 = 68
1a = 68

Divide each side by '1'.
a = 68

Simplifying
a = 68

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