math project 4

math project 4

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  • Multiply -3 to x and -4, so -3x+12=-9. Then -9-12=-21, so -3x=-21. The x equals 7!
  • YES!!
  • Now, I'm going to show you how to solve two-step equation. Let's say the equation is 2n+3=9. You need to use the golden rule. The opposite operation of addition is subtraction, so you need to subract 3 to 9. Then it will be 6. So, what left is 2n=6.
  • I think now you can solve 2n=6 easily because it's one-step equation that you just learned!
  • Yep! n equals 3!
  • 11-7=4, then    =4. 3*4=12, so n=12!
  • I will give you 2 more questions!   +7=11
  • 5*4=20, then 4n=20, so n=5!
  • YES! You are very good! Last equation is 4n  4=5
  • YES!
  • Very good.. Now, can you verify all the equations?
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