8.6a+13=90.4

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Solution for 8.6a+13=90.4 equation: 


Simplifying
8.6a + 13 = 90.4

Reorder the terms:
13 + 8.6a = 90.4

Solving
13 + 8.6a = 90.4

Solving for variable 'a'.

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

Add '-13' to each side of the equation.
13 + -13 + 8.6a = 90.4 + -13

Combine like terms: 13 + -13 = 0
0 + 8.6a = 90.4 + -13
8.6a = 90.4 + -13

Combine like terms: 90.4 + -13 = 77.4
8.6a = 77.4

Divide each side by '8.6'.
a = 9

Simplifying
a = 9

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