From here, just make it inverse:

Answer:
using the foil
Step-by-step explanation:
you always have to get rid of the x for example if it is +3x you add it on to get rid of it and you carry on until you have solved x.
Answer:
$25,000
Step-by-step explanation:
You already have 2,000 so all you need to do is get the other 2,000. So you would have to divide 7,000 by 100 which =70 then multiply it by 8 and you get 560. so times it by 4 you get 2,240 so he would need to sale about 28,000 to get 4240, but it a little over, so the answer to get $4000 is not perfect but the closest is $25,004 which is 7,000/100=70 x 3.5715 which will be $2,000.04.
Answer:
16
Step-by-step explanation:
-4(16+5)
5+16=20
20 sub -4 = 16