3y+4y+6y=20

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Solution for 3y+4y+6y=20 equation: 


Simplifying
3y + 4y + 6y = 20

Combine like terms: 3y + 4y = 7y
7y + 6y = 20

Combine like terms: 7y + 6y = 13y
13y = 20

Solving
13y = 20

Solving for variable 'y'.

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

Divide each side by '13'.
y = 1.538461538

Simplifying
y = 1.538461538

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