28=7-3x

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Solution for 28=7-3x equation:


Simplifying
28 = 7 + -3x

Solving
28 = 7 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
28 + 3x = 7 + -3x + 3x

Combine like terms: -3x + 3x = 0
28 + 3x = 7 + 0
28 + 3x = 7

Add '-28' to each side of the equation.
28 + -28 + 3x = 7 + -28

Combine like terms: 28 + -28 = 0
0 + 3x = 7 + -28
3x = 7 + -28

Combine like terms: 7 + -28 = -21
3x = -21

Divide each side by '3'.
x = -7

Simplifying
x = -7

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