X-12*7=21

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Solution for X-12*7=21 equation: 


Simplifying
X + -12 * 7 = 21

Multiply -12 * 7
X + -84 = 21

Reorder the terms:
-84 + X = 21

Solving
-84 + X = 21

Solving for variable 'X'.

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

Add '84' to each side of the equation.
-84 + 84 + X = 21 + 84

Combine like terms: -84 + 84 = 0
0 + X = 21 + 84
X = 21 + 84

Combine like terms: 21 + 84 = 105
X = 105

Simplifying
X = 105

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