kathi starts with a number. she adds 3 to her number, then doubles the result. finally, she subtracts 7. if she ended with 9 what number did ahe start with
An equation is: 2(x+3)-7=9 Distribute the 2 2(x)+2(3) -7=9 2x+6-7=9 Combine like terms 2x-1=9 Add one to both sides 2x-1+1=9+1 2x=10 Divide both sides by two to isolate the variable. 2x/2=10/2 x=m
