21=9+10x

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Solution for 21=9+10x equation:


Simplifying
21 = 9 + 10x

Solving
21 = 9 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
21 + -10x = 9 + 10x + -10x

Combine like terms: 10x + -10x = 0
21 + -10x = 9 + 0
21 + -10x = 9

Add '-21' to each side of the equation.
21 + -21 + -10x = 9 + -21

Combine like terms: 21 + -21 = 0
0 + -10x = 9 + -21
-10x = 9 + -21

Combine like terms: 9 + -21 = -12
-10x = -12

Divide each side by '-10'.
x = 1.2

Simplifying
x = 1.2

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