1+3.1a-6.1a=-0.5

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Solution for 1+3.1a-6.1a=-0.5 equation: 


Simplifying
1 + 3.1a + -6.1a = -0.5

Combine like terms: 3.1a + -6.1a = -3a
1 + -3a = -0.5

Solving
1 + -3a = -0.5

Solving for variable 'a'.

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

Add '-1' to each side of the equation.
1 + -1 + -3a = -0.5 + -1

Combine like terms: 1 + -1 = 0
0 + -3a = -0.5 + -1
-3a = -0.5 + -1

Combine like terms: -0.5 + -1 = -1.5
-3a = -1.5

Divide each side by '-3'.
a = 0.5

Simplifying
a = 0.5

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