a+(a-20)=80

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Solution for a+(a-20)=80 equation:


Simplifying
a + (a + -20) = 80

Reorder the terms:
a + (-20 + a) = 80

Remove parenthesis around (-20 + a)
a + -20 + a = 80

Reorder the terms:
-20 + a + a = 80

Combine like terms: a + a = 2a
-20 + 2a = 80

Solving
-20 + 2a = 80

Solving for variable 'a'.

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

Add '20' to each side of the equation.
-20 + 20 + 2a = 80 + 20

Combine like terms: -20 + 20 = 0
0 + 2a = 80 + 20
2a = 80 + 20

Combine like terms: 80 + 20 = 100
2a = 100

Divide each side by '2'.
a = 50

Simplifying
a = 50

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