Do the south 64 and then the 21 you never the .43
17 * 0 + -2.
Now we rewrite the equation and make it 17 * 0 - 2 and u get -2.
Hey there!
Set up an equation. This would be 4+0.5x=12. You have to get x by itself, so subtract 4 on each side. You get 0.5x=8. Divide by 0.5 on each side to get x=16. Heidi purchased 16 tickets.
I hope this helps!