7.85-2.15a=20.75

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Solution for 7.85-2.15a=20.75 equation: 


Simplifying
7.85 + -2.15a = 20.75

Solving
7.85 + -2.15a = 20.75

Solving for variable 'a'.

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

Add '-7.85' to each side of the equation.
7.85 + -7.85 + -2.15a = 20.75 + -7.85

Combine like terms: 7.85 + -7.85 = 0.00
0.00 + -2.15a = 20.75 + -7.85
-2.15a = 20.75 + -7.85

Combine like terms: 20.75 + -7.85 = 12.9
-2.15a = 12.9

Divide each side by '-2.15'.
a = -6

Simplifying
a = -6

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