7x*-4=80

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Solution for 7x*-4=80 equation: 


Simplifying
7x * -4 = 80

Reorder the terms for easier multiplication:
7 * -4x = 80

Multiply 7 * -4
-28x = 80

Solving
-28x = 80

Solving for variable 'x'.

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

Divide each side by '-28'.
x = -2.857142857

Simplifying
x = -2.857142857

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