5x+21=(9x-1)2

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Solution for 5x+21=(9x-1)2 equation:


Simplifying
5x + 21 = (9x + -1) * 2

Reorder the terms:
21 + 5x = (9x + -1) * 2

Reorder the terms:
21 + 5x = (-1 + 9x) * 2

Reorder the terms for easier multiplication:
21 + 5x = 2(-1 + 9x)
21 + 5x = (-1 * 2 + 9x * 2)
21 + 5x = (-2 + 18x)

Solving
21 + 5x = -2 + 18x

Solving for variable 'x'.

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

Add '-18x' to each side of the equation.
21 + 5x + -18x = -2 + 18x + -18x

Combine like terms: 5x + -18x = -13x
21 + -13x = -2 + 18x + -18x

Combine like terms: 18x + -18x = 0
21 + -13x = -2 + 0
21 + -13x = -2

Add '-21' to each side of the equation.
21 + -21 + -13x = -2 + -21

Combine like terms: 21 + -21 = 0
0 + -13x = -2 + -21
-13x = -2 + -21

Combine like terms: -2 + -21 = -23
-13x = -23

Divide each side by '-13'.
x = 1.769230769

Simplifying
x = 1.769230769

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