6X+21=87

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Solution for 6X+21=87 equation: 


Simplifying
6X + 21 = 87

Reorder the terms:
21 + 6X = 87

Solving
21 + 6X = 87

Solving for variable 'X'.

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

Add '-21' to each side of the equation.
21 + -21 + 6X = 87 + -21

Combine like terms: 21 + -21 = 0
0 + 6X = 87 + -21
6X = 87 + -21

Combine like terms: 87 + -21 = 66
6X = 66

Divide each side by '6'.
X = 11

Simplifying
X = 11

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