0.5x+3.9=0.4x+2.8

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Solution for 0.5x+3.9=0.4x+2.8 equation: 


Simplifying
0.5x + 3.9 = 0.4x + 2.8

Reorder the terms:
3.9 + 0.5x = 0.4x + 2.8

Reorder the terms:
3.9 + 0.5x = 2.8 + 0.4x

Solving
3.9 + 0.5x = 2.8 + 0.4x

Solving for variable 'x'.

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

Add '-0.4x' to each side of the equation.
3.9 + 0.5x + -0.4x = 2.8 + 0.4x + -0.4x

Combine like terms: 0.5x + -0.4x = 0.1x
3.9 + 0.1x = 2.8 + 0.4x + -0.4x

Combine like terms: 0.4x + -0.4x = 0.0
3.9 + 0.1x = 2.8 + 0.0
3.9 + 0.1x = 2.8

Add '-3.9' to each side of the equation.
3.9 + -3.9 + 0.1x = 2.8 + -3.9

Combine like terms: 3.9 + -3.9 = 0.0
0.0 + 0.1x = 2.8 + -3.9
0.1x = 2.8 + -3.9

Combine like terms: 2.8 + -3.9 = -1.1
0.1x = -1.1

Divide each side by '0.1'.
x = -11

Simplifying
x = -11

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