7x+3=21x+9

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Solution for 7x+3=21x+9 equation:


Simplifying
7x + 3 = 21x + 9

Reorder the terms:
3 + 7x = 21x + 9

Reorder the terms:
3 + 7x = 9 + 21x

Solving
3 + 7x = 9 + 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
3 + 7x + -21x = 9 + 21x + -21x

Combine like terms: 7x + -21x = -14x
3 + -14x = 9 + 21x + -21x

Combine like terms: 21x + -21x = 0
3 + -14x = 9 + 0
3 + -14x = 9

Add '-3' to each side of the equation.
3 + -3 + -14x = 9 + -3

Combine like terms: 3 + -3 = 0
0 + -14x = 9 + -3
-14x = 9 + -3

Combine like terms: 9 + -3 = 6
-14x = 6

Divide each side by '-14'.
x = -0.4285714286

Simplifying
x = -0.4285714286

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