-(4+a)=3a

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

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

Solving
-4 + -1a = 3a

Solving for variable 'a'.

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

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

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

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

Add '4' to each side of the equation.
-4 + 4 + -4a = 0 + 4

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

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

Divide each side by '-4'.
a = -1

Simplifying
a = -1