7x+3y-21=0

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Solution for 7x+3y-21=0 equation:


Simplifying
7x + 3y + -21 = 0

Reorder the terms:
-21 + 7x + 3y = 0

Solving
-21 + 7x + 3y = 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 + 3y = 0 + 21

Reorder the terms:
-21 + 21 + 7x + 3y = 0 + 21

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

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

Add '-3y' to each side of the equation.
7x + 3y + -3y = 21 + -3y

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

Divide each side by '7'.
x = 3 + -0.4285714286y

Simplifying
x = 3 + -0.4285714286y

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