a+(a+18)=84

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Solution for a+(a+18)=84 equation:


Simplifying
a + (a + 18) = 84

Reorder the terms:
a + (18 + a) = 84

Remove parenthesis around (18 + a)
a + 18 + a = 84

Reorder the terms:
18 + a + a = 84

Combine like terms: a + a = 2a
18 + 2a = 84

Solving
18 + 2a = 84

Solving for variable 'a'.

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

Add '-18' to each side of the equation.
18 + -18 + 2a = 84 + -18

Combine like terms: 18 + -18 = 0
0 + 2a = 84 + -18
2a = 84 + -18

Combine like terms: 84 + -18 = 66
2a = 66

Divide each side by '2'.
a = 33

Simplifying
a = 33

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