5X+X-3=21

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Solution for 5X+X-3=21 equation: 


Simplifying
5X + X + -3 = 21

Reorder the terms:
-3 + 5X + X = 21

Combine like terms: 5X + X = 6X
-3 + 6X = 21

Solving
-3 + 6X = 21

Solving for variable 'X'.

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

Add '3' to each side of the equation.
-3 + 3 + 6X = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 6X = 21 + 3
6X = 21 + 3

Combine like terms: 21 + 3 = 24
6X = 24

Divide each side by '6'.
X = 4

Simplifying
X = 4

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