y=42-3y

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Solution for y=42-3y equation: 


Simplifying
y = 42 + -3y

Solving
y = 42 + -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.
y + 3y = 42 + -3y + 3y

Combine like terms: y + 3y = 4y
4y = 42 + -3y + 3y

Combine like terms: -3y + 3y = 0
4y = 42 + 0
4y = 42

Divide each side by '4'.
y = 10.5

Simplifying
y = 10.5

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