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Find 4x - 5y if x = -5, y = 3
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Can you multiply?
Just sub in the given values: \[4*(-5)-5*3\]
4x means 4 times x and 5y means 5 times y
but my answers that i have to go with are -5 5 35 -35
Well what is -20 -15?
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-35..
4*-5 is -20 and -5*3is -15
is it -35 or -15?
subtracting from a negative, means it gets more negative
so its -5?
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lets put it this way \[-(20+15)\] here you've taken out the negative sign
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