5X+9=10X-21

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Solution for 5X+9=10X-21 equation:


Simplifying
5X + 9 = 10X + -21

Reorder the terms:
9 + 5X = 10X + -21

Reorder the terms:
9 + 5X = -21 + 10X

Solving
9 + 5X = -21 + 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.
9 + 5X + -10X = -21 + 10X + -10X

Combine like terms: 5X + -10X = -5X
9 + -5X = -21 + 10X + -10X

Combine like terms: 10X + -10X = 0
9 + -5X = -21 + 0
9 + -5X = -21

Add '-9' to each side of the equation.
9 + -9 + -5X = -21 + -9

Combine like terms: 9 + -9 = 0
0 + -5X = -21 + -9
-5X = -21 + -9

Combine like terms: -21 + -9 = -30
-5X = -30

Divide each side by '-5'.
X = 6

Simplifying
X = 6

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