3y+2.1=5y+y-18.9

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Solution for 3y+2.1=5y+y-18.9 equation: 


Simplifying
3y + 2.1 = 5y + y + -18.9

Reorder the terms:
2.1 + 3y = 5y + y + -18.9

Reorder the terms:
2.1 + 3y = -18.9 + 5y + y

Combine like terms: 5y + y = 6y
2.1 + 3y = -18.9 + 6y

Solving
2.1 + 3y = -18.9 + 6y

Solving for variable 'y'.

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

Add '-6y' to each side of the equation.
2.1 + 3y + -6y = -18.9 + 6y + -6y

Combine like terms: 3y + -6y = -3y
2.1 + -3y = -18.9 + 6y + -6y

Combine like terms: 6y + -6y = 0
2.1 + -3y = -18.9 + 0
2.1 + -3y = -18.9

Add '-2.1' to each side of the equation.
2.1 + -2.1 + -3y = -18.9 + -2.1

Combine like terms: 2.1 + -2.1 = 0.0
0.0 + -3y = -18.9 + -2.1
-3y = -18.9 + -2.1

Combine like terms: -18.9 + -2.1 = -21
-3y = -21

Divide each side by '-3'.
y = 7

Simplifying
y = 7

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