Math project~ multi-step equation

Math project~ multi-step equation
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  • Could you help me with multi-step equations?
  •                          28-7x<-4(-7x-7)
  • oh! Hello Sally.
  • sure.
  •                          28-7x<-4(-7x-7)
  • For this problem the first step is to use distributive property and multiply the numbers in the parenthesis by -4.
  •                  28-7x < -4(-7x-7)                      28-7x < 28x-28
  • After that you are going to add 7 to the variables of x
  •                  28-7x < -4(-7x-7)                      28-7x < 28x-28                    +7x   +7x                     28 < 35x+28 
  • Next you need to subtract 28 from both sides underneath each constant number
  •                  28-7x < -4(-7x-7)                      28-7x < 28x-28                    +7x   +7x                     28 < 35x+28                     -28       -28                      0 < 35x
  • Last you need to divide the two remaining numbers by 35
  •                  28-7x < -4(-7x-7)                      28-7x < 28x-28                    +7x   +7x                     28 < 35x+28                     -28       -28                      0 < 35                        0/35=0    35x/35=x
  • Therefore, X=0 !!! Yay! we're done.
  • X=0
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