3x-(x+0.4)=8

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Solution for 3x-(x+0.4)=8 equation:


Simplifying
3x + -1(x + 0.4) = 8

Reorder the terms:
3x + -1(0.4 + x) = 8
3x + (0.4 * -1 + x * -1) = 8
3x + (-0.4 + -1x) = 8

Reorder the terms:
-0.4 + 3x + -1x = 8

Combine like terms: 3x + -1x = 2x
-0.4 + 2x = 8

Solving
-0.4 + 2x = 8

Solving for variable 'x'.

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

Add '0.4' to each side of the equation.
-0.4 + 0.4 + 2x = 8 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + 2x = 8 + 0.4
2x = 8 + 0.4

Combine like terms: 8 + 0.4 = 8.4
2x = 8.4

Divide each side by '2'.
x = 4.2

Simplifying
x = 4.2

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