.2x+.4=.7x-3.1

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Solution for .2x+.4=.7x-3.1 equation:


Simplifying
0.2x + 0.4 = 0.7x + -3.1

Reorder the terms:
0.4 + 0.2x = 0.7x + -3.1

Reorder the terms:
0.4 + 0.2x = -3.1 + 0.7x

Solving
0.4 + 0.2x = -3.1 + 0.7x

Solving for variable 'x'.

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

Add '-0.7x' to each side of the equation.
0.4 + 0.2x + -0.7x = -3.1 + 0.7x + -0.7x

Combine like terms: 0.2x + -0.7x = -0.5x
0.4 + -0.5x = -3.1 + 0.7x + -0.7x

Combine like terms: 0.7x + -0.7x = 0.0
0.4 + -0.5x = -3.1 + 0.0
0.4 + -0.5x = -3.1

Add '-0.4' to each side of the equation.
0.4 + -0.4 + -0.5x = -3.1 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + -0.5x = -3.1 + -0.4
-0.5x = -3.1 + -0.4

Combine like terms: -3.1 + -0.4 = -3.5
-0.5x = -3.5

Divide each side by '-0.5'.
x = 7

Simplifying
x = 7

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