42=8+2r-2-8r

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Solution for 42=8+2r-2-8r equation:


42=8+2r-2-8r

We simplify the equation to the form, which is simple to understand 
42=8+2r-2-8r

We move all terms containing r to the left and all other terms to the right. 
-2r+8r=+8-2-42

We simplify left and right side of the equation. 
+6r=-36

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

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