2.1y-1.9=-1.9y+21

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Solution for 2.1y-1.9=-1.9y+21 equation: 


Simplifying
2.1y + -1.9 = -1.9y + 21

Reorder the terms:
-1.9 + 2.1y = -1.9y + 21

Reorder the terms:
-1.9 + 2.1y = 21 + -1.9y

Solving
-1.9 + 2.1y = 21 + -1.9y

Solving for variable 'y'.

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

Add '1.9y' to each side of the equation.
-1.9 + 2.1y + 1.9y = 21 + -1.9y + 1.9y

Combine like terms: 2.1y + 1.9y = 4y
-1.9 + 4y = 21 + -1.9y + 1.9y

Combine like terms: -1.9y + 1.9y = 0.0
-1.9 + 4y = 21 + 0.0
-1.9 + 4y = 21

Add '1.9' to each side of the equation.
-1.9 + 1.9 + 4y = 21 + 1.9

Combine like terms: -1.9 + 1.9 = 0.0
0.0 + 4y = 21 + 1.9
4y = 21 + 1.9

Combine like terms: 21 + 1.9 = 22.9
4y = 22.9

Divide each side by '4'.
y = 5.725

Simplifying
y = 5.725

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