A+(A+9)=99

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Solution for A+(A+9)=99 equation:


Simplifying
A + (A + 9) = 99

Reorder the terms:
A + (9 + A) = 99

Remove parenthesis around (9 + A)
A + 9 + A = 99

Reorder the terms:
9 + A + A = 99

Combine like terms: A + A = 2A
9 + 2A = 99

Solving
9 + 2A = 99

Solving for variable 'A'.

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

Add '-9' to each side of the equation.
9 + -9 + 2A = 99 + -9

Combine like terms: 9 + -9 = 0
0 + 2A = 99 + -9
2A = 99 + -9

Combine like terms: 99 + -9 = 90
2A = 90

Divide each side by '2'.
A = 45

Simplifying
A = 45

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