28=3x-7x

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Solution for 28=3x-7x equation:


Simplifying
28 = 3x + -7x

Combine like terms: 3x + -7x = -4x
28 = -4x

Solving
28 = -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
28 + 4x = -4x + 4x

Combine like terms: -4x + 4x = 0
28 + 4x = 0

Add '-28' to each side of the equation.
28 + -28 + 4x = 0 + -28

Combine like terms: 28 + -28 = 0
0 + 4x = 0 + -28
4x = 0 + -28

Combine like terms: 0 + -28 = -28
4x = -28

Divide each side by '4'.
x = -7

Simplifying
x = -7

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