-400=-20(x-9)

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Solution for -400=-20(x-9) equation:


-400=-20(x-9)

We simplify the equation to the form, which is simple to understand 
-400=-20(x-9)

Reorder the terms in parentheses
-400=+(-20x+180)

Remove unnecessary parentheses
-400=-20x+180

We move all terms containing x to the left and all other terms to the right. 
+20x=+180+400

We simplify left and right side of the equation. 
+20x=+580

We divide both sides of the equation by 020 to get x. 
x=29

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