2y-21=7y-21

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Solution for 2y-21=7y-21 equation:


Simplifying
2y + -21 = 7y + -21

Reorder the terms:
-21 + 2y = 7y + -21

Reorder the terms:
-21 + 2y = -21 + 7y

Add '21' to each side of the equation.
-21 + 21 + 2y = -21 + 21 + 7y

Combine like terms: -21 + 21 = 0
0 + 2y = -21 + 21 + 7y
2y = -21 + 21 + 7y

Combine like terms: -21 + 21 = 0
2y = 0 + 7y
2y = 7y

Solving
2y = 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.
2y + -7y = 7y + -7y

Combine like terms: 2y + -7y = -5y
-5y = 7y + -7y

Combine like terms: 7y + -7y = 0
-5y = 0

Divide each side by '-5'.
y = 0

Simplifying
y = 0

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