20-0.4a=-45

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Solution for 20-0.4a=-45 equation: 


Simplifying
20 + -0.4a = -45

Solving
20 + -0.4a = -45

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 + -0.4a = -45 + -20

Combine like terms: 20 + -20 = 0
0 + -0.4a = -45 + -20
-0.4a = -45 + -20

Combine like terms: -45 + -20 = -65
-0.4a = -65

Divide each side by '-0.4'.
a = 162.5

Simplifying
a = 162.5

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