2.8=-5.5a-(-9a+0.2)

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Solution for 2.8=-5.5a-(-9a+0.2) equation: 


Simplifying
2.8 = -5.5a + -1(-9a + 0.2)

Reorder the terms:
2.8 = -5.5a + -1(0.2 + -9a)
2.8 = -5.5a + (0.2 * -1 + -9a * -1)
2.8 = -5.5a + (-0.2 + 9a)

Reorder the terms:
2.8 = -0.2 + -5.5a + 9a

Combine like terms: -5.5a + 9a = 3.5a
2.8 = -0.2 + 3.5a

Solving
2.8 = -0.2 + 3.5a

Solving for variable 'a'.

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

Add '-3.5a' to each side of the equation.
2.8 + -3.5a = -0.2 + 3.5a + -3.5a

Combine like terms: 3.5a + -3.5a = 0.0
2.8 + -3.5a = -0.2 + 0.0
2.8 + -3.5a = -0.2

Add '-2.8' to each side of the equation.
2.8 + -2.8 + -3.5a = -0.2 + -2.8

Combine like terms: 2.8 + -2.8 = 0.0
0.0 + -3.5a = -0.2 + -2.8
-3.5a = -0.2 + -2.8

Combine like terms: -0.2 + -2.8 = -3
-3.5a = -3

Divide each side by '-3.5'.
a = 0.8571428571

Simplifying
a = 0.8571428571

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