2a+4.2=3.9-1.6

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Solution for 2a+4.2=3.9-1.6 equation:


Simplifying
2a + 4.2 = 3.9 + -1.6

Reorder the terms:
4.2 + 2a = 3.9 + -1.6

Combine like terms: 3.9 + -1.6 = 2.3
4.2 + 2a = 2.3

Solving
4.2 + 2a = 2.3

Solving for variable 'a'.

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

Add '-4.2' to each side of the equation.
4.2 + -4.2 + 2a = 2.3 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + 2a = 2.3 + -4.2
2a = 2.3 + -4.2

Combine like terms: 2.3 + -4.2 = -1.9
2a = -1.9

Divide each side by '2'.
a = -0.95

Simplifying
a = -0.95

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