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

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


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

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

Solving
-3 + -1a = -18 + -4a

Solving for variable 'a'.

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

Add '4a' to each side of the equation.
-3 + -1a + 4a = -18 + -4a + 4a

Combine like terms: -1a + 4a = 3a
-3 + 3a = -18 + -4a + 4a

Combine like terms: -4a + 4a = 0
-3 + 3a = -18 + 0
-3 + 3a = -18

Add '3' to each side of the equation.
-3 + 3 + 3a = -18 + 3

Combine like terms: -3 + 3 = 0
0 + 3a = -18 + 3
3a = -18 + 3

Combine like terms: -18 + 3 = -15
3a = -15

Divide each side by '3'.
a = -5

Simplifying
a = -5

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