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-2r+7(4-6r)=-8(5r-6)
We simplify the equation to the form, which is simple to understand
-2r+7(4-6r)=-8(5r-6)
Reorder the terms in parentheses
-2r+(+28-42r)=-8*(5r-6)
Remove unnecessary parentheses
-2r+28-42r=-8+*(+5r-6+)
Reorder the terms in parentheses
-2r+28-42r=+(-40r+48)
Remove unnecessary parentheses
-2r+28-42r=-40r+48
We move all terms containing r to the left and all other terms to the right.
-2r-42r+40r=+48-28
We simplify left and right side of the equation.
-4r=+20
We divide both sides of the equation by -4 to get r.
r=-5
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