Kaitlyn and Bella's Math Project

Kaitlyn and Bella's Math Project

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  • Explain how to solve the equation on the board.
  • -2 (3/4c+9) = 1/4 (8-c)
  • -1.5c-18 = 2-1/4c
  • First I distributed the -2 and the 1/4 to the parentheses on the correct side.
  • I'm confused.
  • 17.5c=-2c
  • Once you have distributed, you combine the numbers on each side of the equal sign
  • I thought you had to combine like terms
  • Does anyone agree with Matthew?
  • 17.5c=-2c
  • I thought you were supposed to combine like terms
  • Would you like to show us Cathy?
  • -2(3/4c+9)=1/4(8-x) -3/4c-18=2-1/4c -6c-72=8-x -6x+x=8+72 -5c=80 divide both sides by 5 c=-16
  • wow. I didn't know that not combining like terms would mess up my problem so much
  • That's what I got too
  • Great job kids 
  • verify: -2[3/4(-16)+9]=1/4(8+16) -2(-12+9)=1/4(24) -2(-3)=1/4(24) 6=6
  • I understand now!
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