9a-4(2a+5)=0

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Solution for 9a-4(2a+5)=0 equation:


Simplifying
9a + -4(2a + 5) = 0

Reorder the terms:
9a + -4(5 + 2a) = 0
9a + (5 * -4 + 2a * -4) = 0
9a + (-20 + -8a) = 0

Reorder the terms:
-20 + 9a + -8a = 0

Combine like terms: 9a + -8a = 1a
-20 + 1a = 0

Solving
-20 + 1a = 0

Solving for variable 'a'.

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

Add '20' to each side of the equation.
-20 + 20 + 1a = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 1a = 0 + 20
1a = 0 + 20

Combine like terms: 0 + 20 = 20
1a = 20

Divide each side by '1'.
a = 20

Simplifying
a = 20

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