What is your answer to this math problem?

1,472 Views | 16 Replies | Last: 6 yr ago by kb2001
khkman22
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AG
I know the answer and have seen the solution to this problem, just want to see how many others agree/disagree with the solution.

|4 - 8(3 - 12)| - |5 - 11|
tk for tu juan
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I'm absolutely not solving that
emac0002
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AG


= |4 + 72| - |5 - 11|

= |76| - |-6|

= 76 - 6 = 70
Mathguy64
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70
trueaggie2782
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Shouldn't it be 76 + 6 = 82
OasisMan
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AG
emac0002 said:



= |4 + 72| - |5 - 11|

= |76| - |-6|

= 76 - 6 = 70
this is how I see it too
trueaggie2782
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Are those supposed to be brackets or absolute value bars? If brackets, 82. If absolute value bars, 70.
Bobcat-Ag
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70
txag2k
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70
khkman22
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They're absolute value and the answer is 70.

My question is why subtracting 8*(-9) is changed to adding -8*(-9)? No issue with the order of operations, just in how you read it. If it were as simple as 4 - 8, you wouldn't say what is 4 + -8 when reading the problem. Also, just the fact that the - is not right next to the number is why I don't understand why it's accepted to just change the sign to a negative, multiply, and then add instead of multiplying first and then subtracting.
trueaggie2782
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Due to order of operations, the first minus hasn't happened yet so it's technically 4 - -72.
Mathguy64
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Because that's what subtraction is. It's addition with signed numbers.
chipotle
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70

I just looked at everyone else's answer
khkman22
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Sorry for the stupid question. I was too sober when posting. Took me two beers before it became clear. Not sure what I was thinking when looking at it initially.

I even had a post typed to rebut mathguy when it finally clicked.

Finally killed all the dumb brain cells I guess.
Predmid
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https://www.wolframalpha.com/input/?i=%7C4+-+8(3+-+12)%7C+-+%7C5+-+11%7C
Tex117
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70. Eff yeah, I still got it.
TXAGBQ76
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Threeve
kb2001
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$Texas
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