3x-7x=28+56

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Solution for 3x-7x=28+56 equation: 


Simplifying
3x + -7x = 28 + 56

Combine like terms: 3x + -7x = -4x
-4x = 28 + 56

Combine like terms: 28 + 56 = 84
-4x = 84

Solving
-4x = 84

Solving for variable 'x'.

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

Divide each side by '-4'.
x = -21

Simplifying
x = -21

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