x+3*0=21

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Solution for x+3*0=21 equation: 


Simplifying
x + 3 * 0 = 21

Multiply 3 * 0
x + 0 = 21

Anything times zero is zero.
x + 0 = 21

Reorder the terms:
0 + x = 21
Remove the zero:
x = 21

Solving
x = 21

Solving for variable 'x'.

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

Simplifying
x = 21

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