0.4x-1.6=3.1x+2.1

Solution for 0.4x-1.6=3.1x+2.1 equation:

Simplifying
0.4x + -1.6 = 3.1x + 2.1

Reorder the terms:
-1.6 + 0.4x = 3.1x + 2.1

Reorder the terms:
-1.6 + 0.4x = 2.1 + 3.1x

Solving
-1.6 + 0.4x = 2.1 + 3.1x

Solving for variable 'x'.

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

Add '-3.1x' to each side of the equation.
-1.6 + 0.4x + -3.1x = 2.1 + 3.1x + -3.1x

Combine like terms: 0.4x + -3.1x = -2.7x
-1.6 + -2.7x = 2.1 + 3.1x + -3.1x

Combine like terms: 3.1x + -3.1x = 0.0
-1.6 + -2.7x = 2.1 + 0.0
-1.6 + -2.7x = 2.1

Add '1.6' to each side of the equation.
-1.6 + 1.6 + -2.7x = 2.1 + 1.6

Combine like terms: -1.6 + 1.6 = 0.0
0.0 + -2.7x = 2.1 + 1.6
-2.7x = 2.1 + 1.6

Combine like terms: 2.1 + 1.6 = 3.7
-2.7x = 3.7

Divide each side by '-2.7'.
x = -1.37037037

Simplifying
x = -1.37037037