3.4=2.1-0.3y

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Solution for 3.4=2.1-0.3y equation: 


Simplifying
3.4 = 2.1 + -0.3y

Solving
3.4 = 2.1 + -0.3y

Solving for variable 'y'.

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

Add '0.3y' to each side of the equation.
3.4 + 0.3y = 2.1 + -0.3y + 0.3y

Combine like terms: -0.3y + 0.3y = 0.0
3.4 + 0.3y = 2.1 + 0.0
3.4 + 0.3y = 2.1

Add '-3.4' to each side of the equation.
3.4 + -3.4 + 0.3y = 2.1 + -3.4

Combine like terms: 3.4 + -3.4 = 0.0
0.0 + 0.3y = 2.1 + -3.4
0.3y = 2.1 + -3.4

Combine like terms: 2.1 + -3.4 = -1.3
0.3y = -1.3

Divide each side by '0.3'.
y = -4.333333333

Simplifying
y = -4.333333333

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