anonymous
  • anonymous
if 9-5x=12-(6x+7) evaluate x(second power)-3x-2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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sandra
  • sandra
so one way to do this is to solve for x 1. 9 - 5x = 12 - (6x + 7) 2. 9 - 5x = 12 -6x - 7 3. 9 - 5x = 5 - 6x 4. 4 - 5x = -6x 5. 4 = -x 6. x = -4
sandra
  • sandra
so now that you have the value of x, you can stick it into your second equation
sandra
  • sandra
does that make sense?

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anonymous
  • anonymous
oh ok so i had to solve that one part to evaluate the other part
sandra
  • sandra
right exactly
sandra
  • sandra
this is probably setting you up to learn how to do substitution problems, in which the last step is usually inserting the solution to one equation into the next
sandra
  • sandra
(subsituting)
anonymous
  • anonymous
k thanks sandra!

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