7y-21-7x=

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


Simplifying
7y + -21 + -7x = 0

Reorder the terms:
-21 + -7x + 7y = 0

Solving
-21 + -7x + 7y = 0

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + -7x + 21 + 7y = 0 + 21

Reorder the terms:
-21 + 21 + -7x + 7y = 0 + 21

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

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

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

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

Divide each side by '-7'.
x = -3 + y

Simplifying
x = -3 + y

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