1. SOLVING MULTI-STEP EQUATIONS

2. BEFORE SOLVING A MULTI-STEP EQUATION YOU MAY HAVE TO SIMPLIFY. EXAMPLE 3x+5+6x-7=25 1 st step: Identify like terms. 3x+5+6x-7=25 2 nd step: combine like terms. 3x+5+6x-7=25 3x+6x=9x 5-7=-2 9x-2=25 +2 +2 9x=27 3 rd step: Divide both sides by 9. 9x=279 X=3 Holt mcdougal,2010

3. CHECK OUR WORK EXAMPLE 3x+5+6x-7=25 3(3)+5+6(3)-7=25 9+5+18-7=25 9+5+18=32 32-7=25 25=25

4. VARIABLES ON BOTH SIDES EQUATION: 2c+4-3c=-9+c+5 2c-3c=-1c -9+5=-4 -1c+4=-4+c +1c 4=-4+2c +4 8=2c2 4=c or c=4 2(4)+4-3(4)=-9+4+5 8+4-12=-9+9 0=0 Holt mcdougal,2010

5. VARIABLES ON BOTH SIDES EXAMPLE: 3V-8=7+8V -3v -3v NEW EQUATION: -8=7+5v -7 -7 NEW EQUATION: -15=5v 55 ANSWER: -3=v or v=-3 Holt mcdougal, 2010 Click to move on

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7. QUESTION SOLVE FOR X 3x+4x+6=20 Answer: X=3X=5 X=2X=9

8. GREAT JOB YOU ARE CORRECT. CLICK TO END PRESENTATION

9. WRONG ANSWER THE CORRECT ANSWER IS 2 3x+4x+6=20 7x+6=20 combine like terms 3x and 4x -6 -6 isolate the variable 7x= 14 7 7 divide both sides by the variable. X=2 End presentation

10. REFERANCES Holt McDougal, copyright 2010. A division of Houghlin Mifflin Harcourt publishing company