Question

Whats (18-6)x3+5 I need to know

Answer 1

Use PEMDAS                       So (18-6)=12
Parenthesis                           Multiply 12*3=36
Exponent                               Add 36+5=41
Multiply                                  Your answer is 41
Divide
Add
Subtract 

Answer 2

Use PEMDAS.
solve the parenthesis first
18-6 =12 
so 
12 x 3+5
you then multiply.
12x3 is 36
36+5 would give you 41