1X+9=9X+21

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Solution for 1X+9=9X+21 equation:


Simplifying
1X + 9 = 9X + 21

Reorder the terms:
9 + 1X = 9X + 21

Reorder the terms:
9 + 1X = 21 + 9X

Solving
9 + 1X = 21 + 9X

Solving for variable 'X'.

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

Add '-9X' to each side of the equation.
9 + 1X + -9X = 21 + 9X + -9X

Combine like terms: 1X + -9X = -8X
9 + -8X = 21 + 9X + -9X

Combine like terms: 9X + -9X = 0
9 + -8X = 21 + 0
9 + -8X = 21

Add '-9' to each side of the equation.
9 + -9 + -8X = 21 + -9

Combine like terms: 9 + -9 = 0
0 + -8X = 21 + -9
-8X = 21 + -9

Combine like terms: 21 + -9 = 12
-8X = 12

Divide each side by '-8'.
X = -1.5

Simplifying
X = -1.5

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