-280=-10(r+10)

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Solution for -280=-10(r+10) equation:


-280=-10(r+10)

We simplify the equation to the form, which is simple to understand 
-280=-10(r+10)

Reorder the terms in parentheses
-280=+(-10r-100)

Remove unnecessary parentheses
-280=-10r-100

We move all terms containing r to the left and all other terms to the right. 
+10r=-100+280

We simplify left and right side of the equation. 
+10r=+180

We divide both sides of the equation by 010 to get r. 
r=18

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