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chevygirl
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Harkirat
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Why don't u learn how to do them instead of asking for answers???
phi
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This is the same problem as before. Just different numbers.
chevygirl
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Well if you knew me good enough you would now that I don't learn real easy. It isn't that I am choosing not to learn I just don't get how to do it.
skullpatrol
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|dw:1356563774476:dw|
skullpatrol
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Multiply both sides by 7.
chevygirl
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-35 and -7?
skullpatrol
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|dw:1356563975056:dw|
chevygirl
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Am I right?
skullpatrol
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Add 5 to both sides.
chevygirl
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-30 and -2?
skullpatrol
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|dw:1356564176650:dw|
phi
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no, when you multiply 7 times (z-5)/7
\[ \frac{7}{1}\cdot \frac{(z-5)}{7} \]
you get
\[\frac{7(z-5)}{7} \] or
\[ \frac{7}{7}\cdot \frac{(z-5)}{1} \]
7/7 is 1
and (z-5)/1 is (z-5)
multiplying by the 7 makes the denominator "go away"
chevygirl
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OK????
phi
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see skull's first post
chevygirl
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what about it?
phi
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you do not get
-35 and -7?
you get
z-5= -7
chevygirl
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ok. but never mind
skullpatrol
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The answer is {-2} because -2 is the only number that will make z = -2 a true statement.
skullpatrol
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-2 = -2
chevygirl
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ok but the only reason I am asking these questions is because I dont get how to do them @Harkirat
Harkirat
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@chevygirl
Well ask your teacher to explain,in detail, how to solve such sums....u cannot go through life asking others to solve them for you......being able to do themselves will boost your confidence...
chevygirl
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well if my teachers were here i would ask them but they arent here so I cant AND i got put in a different class because i got behind because i am not good at math
skullpatrol
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|dw:1356564567196:dw|
chevygirl
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ok. i will try to REMEMBER this
skullpatrol
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Would you like me to explain how I solved the original equation?
chevygirl
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um no thanks cause i have to do another test
skullpatrol
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Is it a math test?
chevygirl
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yeah
skullpatrol
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If I explain this one you can use the method on most of your other questions.
chevygirl
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yeah but i dont know if it is these type of questions or not
skullpatrol
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There are a lot of these types of questions in math.
skullpatrol
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What grade level?
chevygirl
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7
skullpatrol
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Do you know what an inverse operation is?
chevygirl
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yeah
skullpatrol
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inverse operations: Operations that "undo" each other for example multiplication and division.
skullpatrol
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If the side containing the variable involves a certain order of operations, apply the inverse operations in the opposite order.