10y=21+7y

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Solution for 10y=21+7y equation: 


Simplifying
10y = 21 + 7y

Solving
10y = 21 + 7y

Solving for variable 'y'.

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

Add '-7y' to each side of the equation.
10y + -7y = 21 + 7y + -7y

Combine like terms: 10y + -7y = 3y
3y = 21 + 7y + -7y

Combine like terms: 7y + -7y = 0
3y = 21 + 0
3y = 21

Divide each side by '3'.
y = 7

Simplifying
y = 7

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