anonymous
  • anonymous
write an equation for the inverse f(x)= x-7 ----- 2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
what do you mean by mutliply both sides by 2?
TuringTest
  • TuringTest
1) rename f(x) and call it y 2) multiply both sides by 2 3) add 7 to both sides 4) switch the places of x and y 5) rename y f^(-1)(x) multiply both sides by 2 is like so: x=y/2 2x=y
anonymous
  • anonymous
so the answer wouldnt be y=2x-14/4 after i multpily both sides by 2?

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TuringTest
  • TuringTest
no, the 2's on the right cancel you also forgot to multiply the right side:\[y=\frac{x-7}2\]\[2y=x-7\]now continue with the rest of the steps
TuringTest
  • TuringTest
I meant you forgot to multiply the left side*
anonymous
  • anonymous
okay so now i add 7 to -7 and x right? or to the 2y? im so confused on this stuff!
TuringTest
  • TuringTest
you add it to /both/ sides in an equation, if you do something to one side you must always do it to the other as well, or else the two sides won't be equal anymore
anonymous
  • anonymous
alright, that makes sense.
TuringTest
  • TuringTest
good :D so go ahead and give it a try
anonymous
  • anonymous
somehow, i got 9x=y

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