21-n=-(6n+5)-4

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Solution for 21-n=-(6n+5)-4 equation:


21-n=-(6n+5)-4

We simplify the equation to the form, which is simple to understand 
21-n=-(6n+5)-4

Remove unnecessary parentheses
21-n=-6n-5-4

We move all terms containing n to the left and all other terms to the right. 
-1n+6n=-5-4-21

We simplify left and right side of the equation. 
+5n=-30

We divide both sides of the equation by 5 to get n. 
n=-6

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