28-x=7

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Solution for 28-x=7 equation:


Simplifying
28 + -1x = 7

Solving
28 + -1x = 7

Solving for variable 'x'.

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

Add '-28' to each side of the equation.
28 + -28 + -1x = 7 + -28

Combine like terms: 28 + -28 = 0
0 + -1x = 7 + -28
-1x = 7 + -28

Combine like terms: 7 + -28 = -21
-1x = -21

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

Simplifying
x = 21

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