21x+9=7x+3

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


Simplifying
21x + 9 = 7x + 3

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

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

Solving
9 + 21x = 3 + 7x

Solving for variable 'x'.

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

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

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

Combine like terms: 7x + -7x = 0
9 + 14x = 3 + 0
9 + 14x = 3

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

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

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

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

Simplifying
x = -0.4285714286

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