25-55+(85+65)=a

Solution for 25-55+(85+65)=a equation:

Simplifying
25 + -55 + (85 + 65) = a

Combine like terms: 85 + 65 = 150
25 + -55 + (150) = a
25 + -55 + 150 = a

Combine like terms: 25 + -55 = -30
-30 + 150 = a

Combine like terms: -30 + 150 = 120
120 = a

Solving
120 = 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.
120 + -1a = a + -1a

Combine like terms: a + -1a = 0
120 + -1a = 0

Add '-120' to each side of the equation.
120 + -120 + -1a = 0 + -120

Combine like terms: 120 + -120 = 0
0 + -1a = 0 + -120
-1a = 0 + -120

Combine like terms: 0 + -120 = -120
-1a = -120

Divide each side by '-1'.
a = 120

Simplifying
a = 120