I'm sure you should look it up on Google I'm pretty sure that that would help you more than this stupid app OK look it up on Google or a Siri it will help you a lot better
81-1= 80
80 / 2 = 40
D = 40
So:
40(2) = 81 - 1
Step-by-step explanation:
it's not clear but I tried
Answer:
1.78
Step-by-step explanation:

To solve for x we need to cross multiply it
We have = sign inbetween the fractions so we cross multiply it
9*x = 2* 8
9x = 16
Now we divide by 9 on both sides

so x= 1.7777777778
When we round to two decimal places then
x= 1.78