Increasing a number by 5 and multiplying the result by 7 is the same as multiplying the number by -5 and subtracting 1 from the result. What is the number?
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OpenStudy (superdavesuper):
lets assume the number is x okay? so plz write out "Increasing a number by 5 and multiplying the result by 7" in term of x
OpenStudy (anonymous):
(x+5)*7?
OpenStudy (superdavesuper):
VERY GOOD :) would u do the same for "multiplying the number by -5 and subtracting 1 from the result" plz?
OpenStudy (anonymous):
(-5x)-1?
OpenStudy (superdavesuper):
RIGHT again hahahaaa u hardly need my help :P
So ur Q said the two are the same right?
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OpenStudy (anonymous):
yes. do i equal them to eachother?
OpenStudy (superdavesuper):
yup yup show me wat u got plz
OpenStudy (anonymous):
(x+5)*7=(-5x)-1
7x+35=5x?
OpenStudy (superdavesuper):
OK on the left....no simplification on the right. Then u just move all x terms to one side and everything else to the other side of =
OpenStudy (superdavesuper):
7x+35=-5x-1 go on from here plz :)
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OpenStudy (anonymous):
huh?
OpenStudy (anonymous):
12x=-36?
OpenStudy (anonymous):
x=-3?
OpenStudy (superdavesuper):
right again :)
OpenStudy (anonymous):
-3 is the number?
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OpenStudy (superdavesuper):
something wrong w that answer? yes, -3 is the number!