(25-a)+(2a+3)=40

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Solution for (25-a)+(2a+3)=40 equation:


Simplifying
(25 + -1a) + (2a + 3) = 40

Remove parenthesis around (25 + -1a)
25 + -1a + (2a + 3) = 40

Reorder the terms:
25 + -1a + (3 + 2a) = 40

Remove parenthesis around (3 + 2a)
25 + -1a + 3 + 2a = 40

Reorder the terms:
25 + 3 + -1a + 2a = 40

Combine like terms: 25 + 3 = 28
28 + -1a + 2a = 40

Combine like terms: -1a + 2a = 1a
28 + 1a = 40

Solving
28 + 1a = 40

Solving for variable 'a'.

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

Add '-28' to each side of the equation.
28 + -28 + 1a = 40 + -28

Combine like terms: 28 + -28 = 0
0 + 1a = 40 + -28
1a = 40 + -28

Combine like terms: 40 + -28 = 12
1a = 12

Divide each side by '1'.
a = 12

Simplifying
a = 12

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