Jonh Posted May 8, 2019 Share Posted May 8, 2019 3x=15 Can you help me with this question please So ,we did it in class but I need a help with them, because I don't know what to do next.Can anybody explain the method so I know it the next time. Link to comment Share on other sites More sharing options...
swansont Posted May 8, 2019 Share Posted May 8, 2019 16 minutes ago, Jonh said: 3x=15 Can you help me with this question please So ,we did it in class but I need a help with them, because I don't know what to do next.Can anybody explain the method so I know it the next time. You want to isolate x, using addition, subtraction, multiplication and/or division to do so. Can you do something to the left side so that x appears by itself? 1 Link to comment Share on other sites More sharing options...
Jonh Posted May 8, 2019 Author Share Posted May 8, 2019 find the number that both numbers can divide to = 3 3x/3=15/3 x=5 Is this correct 1 Link to comment Share on other sites More sharing options...
studiot Posted May 8, 2019 Share Posted May 8, 2019 18 minutes ago, Jonh said: find the number that both numbers can divide to = 3 3x/3=15/3 x=5 Is this correct Yes. It is good to remember the rule What ever you do to one side of an equation you must do the same to the other side. So if you divide the 3x by 3 then you must also divide the 15 by 3, Just as you have done. Link to comment Share on other sites More sharing options...
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