-21=-7-7(-5+7p)

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Solution for -21=-7-7(-5+7p) equation:


-21=-7-7(-5+7p)

We simplify the equation to the form, which is simple to understand 
-21=-7-7(-5+7p)

Reorder the terms in parentheses
-21=-7+(+35-49p)

Remove unnecessary parentheses
-21=-7+35-49p

We move all terms containing p to the left and all other terms to the right. 
+49p=-7+35+21

We simplify left and right side of the equation. 
+49p=+49

We divide both sides of the equation by 049 to get p. 
p=1

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