2.1x+42=5.2x-20

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Solution for 2.1x+42=5.2x-20 equation: 


Simplifying
2.1x + 42 = 5.2x + -20

Reorder the terms:
42 + 2.1x = 5.2x + -20

Reorder the terms:
42 + 2.1x = -20 + 5.2x

Solving
42 + 2.1x = -20 + 5.2x

Solving for variable 'x'.

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

Add '-5.2x' to each side of the equation.
42 + 2.1x + -5.2x = -20 + 5.2x + -5.2x

Combine like terms: 2.1x + -5.2x = -3.1x
42 + -3.1x = -20 + 5.2x + -5.2x

Combine like terms: 5.2x + -5.2x = 0.0
42 + -3.1x = -20 + 0.0
42 + -3.1x = -20

Add '-42' to each side of the equation.
42 + -42 + -3.1x = -20 + -42

Combine like terms: 42 + -42 = 0
0 + -3.1x = -20 + -42
-3.1x = -20 + -42

Combine like terms: -20 + -42 = -62
-3.1x = -62

Divide each side by '-3.1'.
x = 20

Simplifying
x = 20

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