4.2+1.9n=0.21

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Solution for 4.2+1.9n=0.21 equation: 


Simplifying
4.2 + 1.9n = 0.21

Solving
4.2 + 1.9n = 0.21

Solving for variable 'n'.

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

Add '-4.2' to each side of the equation.
4.2 + -4.2 + 1.9n = 0.21 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + 1.9n = 0.21 + -4.2
1.9n = 0.21 + -4.2

Combine like terms: 0.21 + -4.2 = -3.99
1.9n = -3.99

Divide each side by '1.9'.
n = -2.1

Simplifying
n = -2.1

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