You can pick a question to answer. you don't have to do all of them. plz plz leave a explanation of how you did it. im struggling

You follow the Order of Operations:
P - parenthesis
E - exponents
M - multiplication
D - division
A - addition
S - subtraction

Take #3 for example:

10-18÷3+1

No parenthesis, no exponents, no multiplication, but there's division! -18÷3, which equals -6.
So, now the newly written equation is:
10-6+1
Next, there's addition. -6+1, which equals -5.
Newly written equation:
10-5
Finally, there's subtraction.
10-5=5
So, the answer is 5.

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!