4.0(5-0.4)=-3.2

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Solution for 4.0(5-0.4)=-3.2 equation: 


Simplifying
4.0(5 + -0.4) = -3.2

Combine like terms: 5 + -0.4 = 4.6
4.0(4.6) = -3.2

Multiply 4.0 * 4.6
18.4 = -3.2

Solving
18.4 = -3.2

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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