(a+30)+(a-18)=180

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Solution for (a+30)+(a-18)=180 equation:


Simplifying
(a + 30) + (a + -18) = 180

Reorder the terms:
(30 + a) + (a + -18) = 180

Remove parenthesis around (30 + a)
30 + a + (a + -18) = 180

Reorder the terms:
30 + a + (-18 + a) = 180

Remove parenthesis around (-18 + a)
30 + a + -18 + a = 180

Reorder the terms:
30 + -18 + a + a = 180

Combine like terms: 30 + -18 = 12
12 + a + a = 180

Combine like terms: a + a = 2a
12 + 2a = 180

Solving
12 + 2a = 180

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + 2a = 180 + -12

Combine like terms: 12 + -12 = 0
0 + 2a = 180 + -12
2a = 180 + -12

Combine like terms: 180 + -12 = 168
2a = 168

Divide each side by '2'.
a = 84

Simplifying
a = 84

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