7.5-2a=20

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Solution for 7.5-2a=20 equation: 


Simplifying
7.5 + -2a = 20

Solving
7.5 + -2a = 20

Solving for variable 'a'.

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

Add '-7.5' to each side of the equation.
7.5 + -7.5 + -2a = 20 + -7.5

Combine like terms: 7.5 + -7.5 = 0.0
0.0 + -2a = 20 + -7.5
-2a = 20 + -7.5

Combine like terms: 20 + -7.5 = 12.5
-2a = 12.5

Divide each side by '-2'.
a = -6.25

Simplifying
a = -6.25

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