4y+2y-3=21

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


Simplifying
4y + 2y + -3 = 21

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

Combine like terms: 4y + 2y = 6y
-3 + 6y = 21

Solving
-3 + 6y = 21

Solving for variable 'y'.

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

Add '3' to each side of the equation.
-3 + 3 + 6y = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 6y = 21 + 3
6y = 21 + 3

Combine like terms: 21 + 3 = 24
6y = 24

Divide each side by '6'.
y = 4

Simplifying
y = 4

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