the number is 6
since the number was lastly added to by 3, you subtract 3 from 45 to get 42
then you will divide 7 from 42
you will get 6
when you do an equation one way, to unsolve it you just go backwards
Answer:
6
Step-by-step explanation:
The setup looks like this
X=the number
7X [tex]7x+3=45[/tex]
Subrtact the 3 from 45
[tex]7x=42[/tex]
Now we need to get rid of the 7 on the left, so in order to do that, we divide seven from both sides
[tex]\frac{7x}{7}= \frac{42}{7}[/tex]
Now we have our answer
[tex]x = 6[/tex]
