25=2(a+9)

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Solution for 25=2(a+9) equation:


Simplifying
25 = 2(a + 9)

Reorder the terms:
25 = 2(9 + a)
25 = (9 * 2 + a * 2)
25 = (18 + 2a)

Solving
25 = 18 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
25 + -2a = 18 + 2a + -2a

Combine like terms: 2a + -2a = 0
25 + -2a = 18 + 0
25 + -2a = 18

Add '-25' to each side of the equation.
25 + -25 + -2a = 18 + -25

Combine like terms: 25 + -25 = 0
0 + -2a = 18 + -25
-2a = 18 + -25

Combine like terms: 18 + -25 = -7
-2a = -7

Divide each side by '-2'.
a = 3.5

Simplifying
a = 3.5

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