40-9=5a

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Solution for 40-9=5a equation:


Simplifying
40 + -9 = 5a

Combine like terms: 40 + -9 = 31
31 = 5a

Solving
31 = 5a

Solving for variable 'a'.

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

Add '-5a' to each side of the equation.
31 + -5a = 5a + -5a

Combine like terms: 5a + -5a = 0
31 + -5a = 0

Add '-31' to each side of the equation.
31 + -31 + -5a = 0 + -31

Combine like terms: 31 + -31 = 0
0 + -5a = 0 + -31
-5a = 0 + -31

Combine like terms: 0 + -31 = -31
-5a = -31

Divide each side by '-5'.
a = 6.2

Simplifying
a = 6.2

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