-11.2+4(2.1+a)=-0.8

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Solution for -11.2+4(2.1+a)=-0.8 equation: 


Simplifying
-11.2 + 4(2.1 + a) = -0.8
-11.2 + (2.1 * 4 + a * 4) = -0.8
-11.2 + (8.4 + 4a) = -0.8

Combine like terms: -11.2 + 8.4 = -2.8
-2.8 + 4a = -0.8

Solving
-2.8 + 4a = -0.8

Solving for variable 'a'.

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

Add '2.8' to each side of the equation.
-2.8 + 2.8 + 4a = -0.8 + 2.8

Combine like terms: -2.8 + 2.8 = 0.0
0.0 + 4a = -0.8 + 2.8
4a = -0.8 + 2.8

Combine like terms: -0.8 + 2.8 = 2
4a = 2

Divide each side by '4'.
a = 0.5

Simplifying
a = 0.5

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