-7x*3-0=21

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Solution for -7x*3-0=21 equation: 


Simplifying
-7x * 3 + 0 = 21

Reorder the terms for easier multiplication:
-7 * 3x + 0 = 21

Multiply -7 * 3
-21x + 0 = 21

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

Solving
-21x = 21

Solving for variable 'x'.

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

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

Simplifying
x = -1

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