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

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


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

Combine like terms: -11.2 + 8.4 = -2.8
-2.8 + 4x = (-0.8)
-2.8 + 4x = -0.8

Solving
-2.8 + 4x = -0.8

Solving for variable 'x'.

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

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

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

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

Divide each side by '4'.
x = 0.5

Simplifying
x = 0.5

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