3x+7x=-400

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Solution for 3x+7x=-400 equation: 


Simplifying
3x + 7x = -400

Combine like terms: 3x + 7x = 10x
10x = -400

Solving
10x = -400

Solving for variable 'x'.

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

Divide each side by '10'.
x = -40

Simplifying
x = -40

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