a+(a+-4)=18

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Solution for a+(a+-4)=18 equation:


Simplifying
a + (a + -4) = 18

Reorder the terms:
a + (-4 + a) = 18

Remove parenthesis around (-4 + a)
a + -4 + a = 18

Reorder the terms:
-4 + a + a = 18

Combine like terms: a + a = 2a
-4 + 2a = 18

Solving
-4 + 2a = 18

Solving for variable 'a'.

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

Add '4' to each side of the equation.
-4 + 4 + 2a = 18 + 4

Combine like terms: -4 + 4 = 0
0 + 2a = 18 + 4
2a = 18 + 4

Combine like terms: 18 + 4 = 22
2a = 22

Divide each side by '2'.
a = 11

Simplifying
a = 11

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