18-(a-4)=9+(a+3)

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Solution for 18-(a-4)=9+(a+3) equation:


Simplifying
18 + -1(a + -4) = 9 + (a + 3)

Reorder the terms:
18 + -1(-4 + a) = 9 + (a + 3)
18 + (-4 * -1 + a * -1) = 9 + (a + 3)
18 + (4 + -1a) = 9 + (a + 3)

Combine like terms: 18 + 4 = 22
22 + -1a = 9 + (a + 3)

Reorder the terms:
22 + -1a = 9 + (3 + a)

Remove parenthesis around (3 + a)
22 + -1a = 9 + 3 + a

Combine like terms: 9 + 3 = 12
22 + -1a = 12 + a

Solving
22 + -1a = 12 + 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.
22 + -1a + -1a = 12 + a + -1a

Combine like terms: -1a + -1a = -2a
22 + -2a = 12 + a + -1a

Combine like terms: a + -1a = 0
22 + -2a = 12 + 0
22 + -2a = 12

Add '-22' to each side of the equation.
22 + -22 + -2a = 12 + -22

Combine like terms: 22 + -22 = 0
0 + -2a = 12 + -22
-2a = 12 + -22

Combine like terms: 12 + -22 = -10
-2a = -10

Divide each side by '-2'.
a = 5

Simplifying
a = 5

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