3x+2.1-1.4=0.4x-2.1

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Solution for 3x+2.1-1.4=0.4x-2.1 equation: 


Simplifying
3x + 2.1 + -1.4 = 0.4x + -2.1

Reorder the terms:
2.1 + -1.4 + 3x = 0.4x + -2.1

Combine like terms: 2.1 + -1.4 = 0.7
0.7 + 3x = 0.4x + -2.1

Reorder the terms:
0.7 + 3x = -2.1 + 0.4x

Solving
0.7 + 3x = -2.1 + 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.
0.7 + 3x + -0.4x = -2.1 + 0.4x + -0.4x

Combine like terms: 3x + -0.4x = 2.6x
0.7 + 2.6x = -2.1 + 0.4x + -0.4x

Combine like terms: 0.4x + -0.4x = 0.0
0.7 + 2.6x = -2.1 + 0.0
0.7 + 2.6x = -2.1

Add '-0.7' to each side of the equation.
0.7 + -0.7 + 2.6x = -2.1 + -0.7

Combine like terms: 0.7 + -0.7 = 0.0
0.0 + 2.6x = -2.1 + -0.7
2.6x = -2.1 + -0.7

Combine like terms: -2.1 + -0.7 = -2.8
2.6x = -2.8

Divide each side by '2.6'.
x = -1.076923077

Simplifying
x = -1.076923077

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