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Mathematics Forum

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Needmathhelp Quote \| Reply \|	Need help on a few questions. NEed hel ASAP posted on: 10/27/2005 6:09:19 PM Its solving equations usting addition and subtraction and these are the questions i dont get, can anyone help me? [y+(-3)]+2=4 16=[n-(-2)]+(-3) and -10=[b+(-4)]+2 Thanks Lots
The_Big_K Quote \| Reply \|	Need help on a few questions. NEed hel ASAP replied on: 11/6/2005 1:47:14 PM Don't worry NeedMathHelp ! I'll help ya Let's start with 1st equation: [y+(-3)]+2=4 Remember the rule: Solve the brackets first, starting with innermost. Like this-> [y-3]+2 = 4 (Got what we're doing here?) => y-3 = 2 => y = 2+3 = 5 Ans: y=5 -------------------- Now let's try second equation: 16=[n-(-2)]+(-3) Again we follow the same rule: solve the innermost brackets first- 16= [n+2]-3 (this is because two 'minus' signs multiplied give a + sign. whereas '-' multiplied with '+' sign gives '-' sign) Hence, 16=n+2-3 => 16= n-1 => 16+1=n => n=17 (ans.) ------------------- On similar lines- -10=[b+(-4)]+2 => -10 = [b-4]+2 => -10 = b-4+2 => -10 = b-2 => -10+2 = b => b = -8 I hope this helps ~ -- The Big K My New Study Forum : http://forum.the-big-k.com
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