2y-4=21-3y

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Solution for 2y-4=21-3y equation:


Simplifying
2y + -4 = 21 + -3y

Reorder the terms:
-4 + 2y = 21 + -3y

Solving
-4 + 2y = 21 + -3y

Solving for variable 'y'.

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

Add '3y' to each side of the equation.
-4 + 2y + 3y = 21 + -3y + 3y

Combine like terms: 2y + 3y = 5y
-4 + 5y = 21 + -3y + 3y

Combine like terms: -3y + 3y = 0
-4 + 5y = 21 + 0
-4 + 5y = 21

Add '4' to each side of the equation.
-4 + 4 + 5y = 21 + 4

Combine like terms: -4 + 4 = 0
0 + 5y = 21 + 4
5y = 21 + 4

Combine like terms: 21 + 4 = 25
5y = 25

Divide each side by '5'.
y = 5

Simplifying
y = 5

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