7x+21=18x+9

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Solution for 7x+21=18x+9 equation:


Simplifying
7x + 21 = 18x + 9

Reorder the terms:
21 + 7x = 18x + 9

Reorder the terms:
21 + 7x = 9 + 18x

Solving
21 + 7x = 9 + 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 + 7x + -18x = 9 + 18x + -18x

Combine like terms: 7x + -18x = -11x
21 + -11x = 9 + 18x + -18x

Combine like terms: 18x + -18x = 0
21 + -11x = 9 + 0
21 + -11x = 9

Add '-21' to each side of the equation.
21 + -21 + -11x = 9 + -21

Combine like terms: 21 + -21 = 0
0 + -11x = 9 + -21
-11x = 9 + -21

Combine like terms: 9 + -21 = -12
-11x = -12

Divide each side by '-11'.
x = 1.090909091

Simplifying
x = 1.090909091

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