6y+21+7=4y-20+5y

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Solution for 6y+21+7=4y-20+5y equation:


Simplifying
6y + 21 + 7 = 4y + -20 + 5y

Reorder the terms:
21 + 7 + 6y = 4y + -20 + 5y

Combine like terms: 21 + 7 = 28
28 + 6y = 4y + -20 + 5y

Reorder the terms:
28 + 6y = -20 + 4y + 5y

Combine like terms: 4y + 5y = 9y
28 + 6y = -20 + 9y

Solving
28 + 6y = -20 + 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
28 + 6y + -9y = -20 + 9y + -9y

Combine like terms: 6y + -9y = -3y
28 + -3y = -20 + 9y + -9y

Combine like terms: 9y + -9y = 0
28 + -3y = -20 + 0
28 + -3y = -20

Add '-28' to each side of the equation.
28 + -28 + -3y = -20 + -28

Combine like terms: 28 + -28 = 0
0 + -3y = -20 + -28
-3y = -20 + -28

Combine like terms: -20 + -28 = -48
-3y = -48

Divide each side by '-3'.
y = 16

Simplifying
y = 16

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