5(a-9)=20

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Solution for 5(a-9)=20 equation: 


Simplifying
5(a + -9) = 20

Reorder the terms:
5(-9 + a) = 20
(-9 * 5 + a * 5) = 20
(-45 + 5a) = 20

Solving
-45 + 5a = 20

Solving for variable 'a'.

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

Add '45' to each side of the equation.
-45 + 45 + 5a = 20 + 45

Combine like terms: -45 + 45 = 0
0 + 5a = 20 + 45
5a = 20 + 45

Combine like terms: 20 + 45 = 65
5a = 65

Divide each side by '5'.
a = 13

Simplifying
a = 13

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