3x=7x-40

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Solution for 3x=7x-40 equation: 


Simplifying
3x = 7x + -40

Reorder the terms:
3x = -40 + 7x

Solving
3x = -40 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
3x + -7x = -40 + 7x + -7x

Combine like terms: 3x + -7x = -4x
-4x = -40 + 7x + -7x

Combine like terms: 7x + -7x = 0
-4x = -40 + 0
-4x = -40

Divide each side by '-4'.
x = 10

Simplifying
x = 10

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