.4x-2+.5x=-1.28

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Solution for .4x-2+.5x=-1.28 equation:


Simplifying
0.4x + -2 + 0.5x = -1.28

Reorder the terms:
-2 + 0.4x + 0.5x = -1.28

Combine like terms: 0.4x + 0.5x = 0.9x
-2 + 0.9x = -1.28

Solving
-2 + 0.9x = -1.28

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + 0.9x = -1.28 + 2

Combine like terms: -2 + 2 = 0
0 + 0.9x = -1.28 + 2
0.9x = -1.28 + 2

Combine like terms: -1.28 + 2 = 0.72
0.9x = 0.72

Divide each side by '0.9'.
x = 0.8

Simplifying
x = 0.8

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