3y+4y=7y

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Solution for 3y+4y=7y equation: 


Simplifying
3y + 4y = 7y

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

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

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

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

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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