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| Author | Message / Information |
| blond_princess06 Quote | Reply | | I need some help solving these problems posted on: 9/7/2005 8:01:45 PM Hello everyone i'am new here , First of all i'am a Senior in High school, and I need to pass the California High School Exit Examination (cahsee) to graduate. Here are the problems I need help on. 1)2X-3=7 2)2N+3<17 3)4(X+5)-3(X+2)=14 4)5(2X-3)-6X<9 5)2X-3Y=12 6)(6A4BC)(7AB3C) ANY HELP WILL BE APPRECIATED, THANKS APRIL |
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The_Big_K
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I need some help solving these problems
replied on: 9/7/2005 10:05:01 PM Hello Blonde Princess  !Ok, let's solve your problems one by one- 1. 2X-3=7 (You've to solve for 'x')- Here's how we go about it. Remember, in order to solve for 'x', you must keep the terms containing 'x' on one side of the '=' sign. In our problem, the term containing 'x' is '2x'. So let's keep it on Left Hand Side of '=' sign. We Get- 2x = 7 + 3 ( see -3 changed to +3 on Right Side). Therefore, 2x = 10. => x= 10/2 = 5 Therefore, x = 5 is your answer ! -------------------------------- 2. 2N+3<17 This is an inequality, and we solve it the way we solved Problem#1. 2N+3<17 => 2N < 17 - 3 => 2N < 14 => N < (14/2) => N < 7 --> That's your answer, Princess! ------------------ 3. 4(X+5)-3(X+2)=14 Looks Complicated? Maybe. But It is not! Work with me-keep in mind that we must group the terms containing 'x' on one side of '=' sign. So-let's solve the brackets first. 4(X+5)-3(X+2)=14 => 4x + 20 - ( 3x + 6 ) = 14 ( got it?) => 4x + 20 - 3x - 6 = 14 ( and this?) => x + 14 = 14 => x = 14 - 14 = 0 Therefore x = 0 is what Princesses's correct answer. ------------------- 4. 5(2X-3)-6X<9 Now with Problems #1,#2 & #3 in bag, Princess must be smiling at Problem#4 ! 5(2X-3)-6X<9 => 10x - 15 - 6x < 9 => 4x < 9 + 15 => 4x < 24 => x < 24/4 => x < 6 ------ Okay Princess, Now I want you to try Problem #5 & #6 on your own. If you get them correct, do send a 'thank you note'  . If you still face some problem, feel free to write to me at the.big.k.in<at>gmail.com Enjoy Math ! -The Big K - Blog: http://the-big-k.blogspot.com Quote: Unless you are the lead dog, the view never changes 
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