4a-2(a+9)=5

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Solution for 4a-2(a+9)=5 equation:


Simplifying
4a + -2(a + 9) = 5

Reorder the terms:
4a + -2(9 + a) = 5
4a + (9 * -2 + a * -2) = 5
4a + (-18 + -2a) = 5

Reorder the terms:
-18 + 4a + -2a = 5

Combine like terms: 4a + -2a = 2a
-18 + 2a = 5

Solving
-18 + 2a = 5

Solving for variable 'a'.

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

Add '18' to each side of the equation.
-18 + 18 + 2a = 5 + 18

Combine like terms: -18 + 18 = 0
0 + 2a = 5 + 18
2a = 5 + 18

Combine like terms: 5 + 18 = 23
2a = 23

Divide each side by '2'.
a = 11.5

Simplifying
a = 11.5

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