20+y-1=9y-9-4y

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Solution for 20+y-1=9y-9-4y equation: 


Simplifying
20 + y + -1 = 9y + -9 + -4y

Reorder the terms:
20 + -1 + y = 9y + -9 + -4y

Combine like terms: 20 + -1 = 19
19 + y = 9y + -9 + -4y

Reorder the terms:
19 + y = -9 + 9y + -4y

Combine like terms: 9y + -4y = 5y
19 + y = -9 + 5y

Solving
19 + y = -9 + 5y

Solving for variable 'y'.

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

Add '-5y' to each side of the equation.
19 + y + -5y = -9 + 5y + -5y

Combine like terms: y + -5y = -4y
19 + -4y = -9 + 5y + -5y

Combine like terms: 5y + -5y = 0
19 + -4y = -9 + 0
19 + -4y = -9

Add '-19' to each side of the equation.
19 + -19 + -4y = -9 + -19

Combine like terms: 19 + -19 = 0
0 + -4y = -9 + -19
-4y = -9 + -19

Combine like terms: -9 + -19 = -28
-4y = -28

Divide each side by '-4'.
y = 7

Simplifying
y = 7

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