1+2r+8r=1+7r+8+4

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Solution for 1+2r+8r=1+7r+8+4 equation:


1+2r+8r=1+7r+8+4

We simplify the equation to the form, which is simple to understand 
1+2r+8r=1+7r+8+4

We move all terms containing r to the left and all other terms to the right. 
+2r+8r-7r=+1+8+4-1

We simplify left and right side of the equation. 
+3r=+12

We divide both sides of the equation by 3 to get r. 
r=4

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