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Basic Algebra

This topic has 1 reply, 2 voices, and was last updated 12 years ago by John Moffat.

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November 14, 2012 at 4:30 pm #55242
lou1
Member
- Topics: 32
- Replies: 23
Can someone help – I understand BODMAS
2x+3=10 how do you know if you should divide both sides by 2 and then subtract 3 from both sides or vice versa as each method will produce a different answer. If you followed the BODMAS rules i.e. divide both side first the answer would be wrong so I’m confussed…..
Thanks
November 14, 2012 at 9:40 pm #107183
John Moffat
Keymaster
- Topics: 57
- Replies: 54655
It doesn’t make any difference!!
If you divide by 2 first, then you get x + 1.5 = 5
Then you can subtract 1.5 and you get x = 3.5
If you subtract 3 first, you get 2x = 7
Then you can divide by 2 and you get x = 3.5
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