aboy
aboy
22-09-2015
Mathematics
contestada
6r+7=13+7r help plz linear equations
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WorldCitizen
WorldCitizen
04-10-2015
Well, let's put all the "r"s on one side, alone:
6r-7r=13-7 //you can put the expressions on the other side of the equation if you change the sign
now we add up:
-r=6
now we multiply both sides by (-1):
r=-6
which is the solution!
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