21X-15=111

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Solution for 21X-15=111 equation: 


Simplifying
21X + -15 = 111

Reorder the terms:
-15 + 21X = 111

Solving
-15 + 21X = 111

Solving for variable 'X'.

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

Add '15' to each side of the equation.
-15 + 15 + 21X = 111 + 15

Combine like terms: -15 + 15 = 0
0 + 21X = 111 + 15
21X = 111 + 15

Combine like terms: 111 + 15 = 126
21X = 126

Divide each side by '21'.
X = 6

Simplifying
X = 6

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