3a+(25-a)=225

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Solution for 3a+(25-a)=225 equation:


Simplifying
3a + (25 + -1a) = 225

Remove parenthesis around (25 + -1a)
3a + 25 + -1a = 225

Reorder the terms:
25 + 3a + -1a = 225

Combine like terms: 3a + -1a = 2a
25 + 2a = 225

Solving
25 + 2a = 225

Solving for variable 'a'.

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

Add '-25' to each side of the equation.
25 + -25 + 2a = 225 + -25

Combine like terms: 25 + -25 = 0
0 + 2a = 225 + -25
2a = 225 + -25

Combine like terms: 225 + -25 = 200
2a = 200

Divide each side by '2'.
a = 100

Simplifying
a = 100

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