-400=5x-7(-1x+40)

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Solution for -400=5x-7(-1x+40) equation:


-400=5x-7 (-1x+40)

We simplify the equation to the form, which is simple to understand 
-400=5x-7(-1x+40)

Reorder the terms in parentheses
-400=5x+(+7x-280)

Remove unnecessary parentheses
-400=+5x+7x-280

We move all terms containing x to the left and all other terms to the right. 
-5x-7x=-280+400

We simplify left and right side of the equation. 
-12x=+120

We divide both sides of the equation by -12 to get x. 
x=-10

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