One reason would be if you did not know the answer so you could do
4-5=x
another reason would be if the problem gave you the answer but not one of the things to get the answer
4-x=-1
not sure if that is what you want but I hope this helped
Answer:12
Step-by-step explanation:
k
Answer: 1/5 x = 10 * 1/5. 1/5x = 2. x = 2*5 = 10
Answer:2.88
Step-by-step explanation:Because 80% is 0.8 and 360% is 3.6 and when u multiply them u get 2.88