kathi starts with a number. she adds 3 to her number, then doubles the result. finally, she subtracts 7. if she ended with 9 wha

Question

Butoxors [25]

3 years ago

8

kathi starts with a number. she adds 3 to her number, then doubles the result. finally, she subtracts 7. if she ended with 9 wha

t number did ahe start with

Mathematics

2 answers:

11111nata11111 [884] · Answer 1 · 2022-05-09T09:52:34+03:00

11111nata11111 [884]3 years ago

6 0

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

soldi70 [24.7K] · Answer 2 · 2022-05-09T11:19:33+03:00

soldi70 [24.7K]3 years ago

6 0

I say

5+3=8
8+8=16
16-7=9