63-7x=21

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Solution for 63-7x=21 equation: 


Simplifying
63 + -7x = 21

Solving
63 + -7x = 21

Solving for variable 'x'.

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

Add '-63' to each side of the equation.
63 + -63 + -7x = 21 + -63

Combine like terms: 63 + -63 = 0
0 + -7x = 21 + -63
-7x = 21 + -63

Combine like terms: 21 + -63 = -42
-7x = -42

Divide each side by '-7'.
x = 6

Simplifying
x = 6

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