4(-3.1)=2.1(x-4)+3.5x

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Solution for 4(-3.1)=2.1(x-4)+3.5x equation: 


Simplifying
4(-3.1) = 2.1(x + -4) + 3.5x

Multiply 4 * -3.1
-12.4 = 2.1(x + -4) + 3.5x

Reorder the terms:
-12.4 = 2.1(-4 + x) + 3.5x
-12.4 = (-4 * 2.1 + x * 2.1) + 3.5x
-12.4 = (-8.4 + 2.1x) + 3.5x

Combine like terms: 2.1x + 3.5x = 5.6x
-12.4 = -8.4 + 5.6x

Solving
-12.4 = -8.4 + 5.6x

Solving for variable 'x'.

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

Add '-5.6x' to each side of the equation.
-12.4 + -5.6x = -8.4 + 5.6x + -5.6x

Combine like terms: 5.6x + -5.6x = 0.0
-12.4 + -5.6x = -8.4 + 0.0
-12.4 + -5.6x = -8.4

Add '12.4' to each side of the equation.
-12.4 + 12.4 + -5.6x = -8.4 + 12.4

Combine like terms: -12.4 + 12.4 = 0.0
0.0 + -5.6x = -8.4 + 12.4
-5.6x = -8.4 + 12.4

Combine like terms: -8.4 + 12.4 = 4
-5.6x = 4

Divide each side by '-5.6'.
x = -0.7142857143

Simplifying
x = -0.7142857143

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