U-S-S-A=W

Solution for U-S-S-A=W equation:

Simplifying
U + -1S + -1S + -1A = W

Reorder the terms:
-1A + -1S + -1S + U = W

Combine like terms: -1S + -1S = -2S
-1A + -2S + U = W

Solving
-1A + -2S + U = W

Solving for variable 'A'.

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

Add '2S' to each side of the equation.
-1A + -2S + 2S + U = 2S + W

Combine like terms: -2S + 2S = 0
-1A + 0 + U = 2S + W
-1A + U = 2S + W

Add '-1U' to each side of the equation.
-1A + U + -1U = 2S + -1U + W

Combine like terms: U + -1U = 0
-1A + 0 = 2S + -1U + W
-1A = 2S + -1U + W

Divide each side by '-1'.
A = -2S + U + -1W

Simplifying
A = -2S + U + -1W