20(a+9)=140

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Solution for 20(a+9)=140 equation: 


Simplifying
20(a + 9) = 140

Reorder the terms:
20(9 + a) = 140
(9 * 20 + a * 20) = 140
(180 + 20a) = 140

Solving
180 + 20a = 140

Solving for variable 'a'.

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

Add '-180' to each side of the equation.
180 + -180 + 20a = 140 + -180

Combine like terms: 180 + -180 = 0
0 + 20a = 140 + -180
20a = 140 + -180

Combine like terms: 140 + -180 = -40
20a = -40

Divide each side by '20'.
a = -2

Simplifying
a = -2

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