erniellyd28
  • erniellyd28
11z-3-7z=9
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
mmm what is (11-7)z =
erniellyd28
  • erniellyd28
4
anonymous
  • anonymous
yes... 11z-3-7z=9 means (11-7)z-3 = 9 which gives 4z-3 = 9; Now do you want to solve for z?

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erniellyd28
  • erniellyd28
thats where i get stuck
erniellyd28
  • erniellyd28
3 to get 9?
erniellyd28
  • erniellyd28
sorry my message didnt sent completely
erniellyd28
  • erniellyd28
do i find a number to multiply
erniellyd28
  • erniellyd28
do i find a number to multiply 4 with and then subtract it from 3 to get 9?
anonymous
  • anonymous
well let us get moving fromwher you got stuck..... equality has a property that if you add or subtract or multiply or divide by same number on both side of equality the result won't be altered.... so.... that is a+b =x is same as a+b+c= x+c a+b-c= x-c (a+b)*c= x*c (a+b)/c = x/c
anonymous
  • anonymous
yes you can find a number which satisfies your rlation by using above property of equality
anonymous
  • anonymous
any idea how?
erniellyd28
  • erniellyd28
4 times 3 =12-3=9?
anonymous
  • anonymous
How you got 4 times 3??
erniellyd28
  • erniellyd28
4z= 4(3)=12 or am i wrong
anonymous
  • anonymous
yes... the method you followed is a round about way...but there is an alternate simple 100% guarntry way using the above property wanna learn it?
erniellyd28
  • erniellyd28
yes please
anonymous
  • anonymous
:) so aftr simplification of 11z-3-7z=9 we got 4z-3 = 9 now add 3 to both sides of equality ( the result will not change because of the property a+b =x is same as a+b+c= x+c) what you get
erniellyd28
  • erniellyd28
12
anonymous
  • anonymous
please type full equation
anonymous
  • anonymous
means both RHS and LHS
erniellyd28
  • erniellyd28
rhs? lhs?
anonymous
  • anonymous
means RHS = Right Hand Side LHS = Left Hand Side of equation
erniellyd28
  • erniellyd28
im so lost im very sorry
anonymous
  • anonymous
in this equation a+b =x a+b is LHS x is RHS

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