8X=7X-21

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Solution for 8X=7X-21 equation: 


Simplifying
8X = 7X + -21

Reorder the terms:
8X = -21 + 7X

Solving
8X = -21 + 7X

Solving for variable 'X'.

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

Add '-7X' to each side of the equation.
8X + -7X = -21 + 7X + -7X

Combine like terms: 8X + -7X = 1X
1X = -21 + 7X + -7X

Combine like terms: 7X + -7X = 0
1X = -21 + 0
1X = -21

Divide each side by '1'.
X = -21

Simplifying
X = -21

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