X+21+10X=20+9X

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Solution for X+21+10X=20+9X equation:


Simplifying
X + 21 + 10X = 20 + 9X

Reorder the terms:
21 + X + 10X = 20 + 9X

Combine like terms: X + 10X = 11X
21 + 11X = 20 + 9X

Solving
21 + 11X = 20 + 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.
21 + 11X + -9X = 20 + 9X + -9X

Combine like terms: 11X + -9X = 2X
21 + 2X = 20 + 9X + -9X

Combine like terms: 9X + -9X = 0
21 + 2X = 20 + 0
21 + 2X = 20

Add '-21' to each side of the equation.
21 + -21 + 2X = 20 + -21

Combine like terms: 21 + -21 = 0
0 + 2X = 20 + -21
2X = 20 + -21

Combine like terms: 20 + -21 = -1
2X = -1

Divide each side by '2'.
X = -0.5

Simplifying
X = -0.5

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