3x+2.8=.4x-.7

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Solution for 3x+2.8=.4x-.7 equation:


Simplifying
3x + 2.8 = 0.4x + -0.7

Reorder the terms:
2.8 + 3x = 0.4x + -0.7

Reorder the terms:
2.8 + 3x = -0.7 + 0.4x

Solving
2.8 + 3x = -0.7 + 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.
2.8 + 3x + -0.4x = -0.7 + 0.4x + -0.4x

Combine like terms: 3x + -0.4x = 2.6x
2.8 + 2.6x = -0.7 + 0.4x + -0.4x

Combine like terms: 0.4x + -0.4x = 0.0
2.8 + 2.6x = -0.7 + 0.0
2.8 + 2.6x = -0.7

Add '-2.8' to each side of the equation.
2.8 + -2.8 + 2.6x = -0.7 + -2.8

Combine like terms: 2.8 + -2.8 = 0.0
0.0 + 2.6x = -0.7 + -2.8
2.6x = -0.7 + -2.8

Combine like terms: -0.7 + -2.8 = -3.5
2.6x = -3.5

Divide each side by '2.6'.
x = -1.346153846

Simplifying
x = -1.346153846

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