Hi Tom,
What is important here is the order of operations. There is a mnemonic that some people use to remember the order it is BEDMAS
 Brackets first
 Exponentiation next
 Division third
 Multiplication
 Addition
 Subtraction.
In your problem there are no brackets, no exponent ion and no divisions first perform the multiplication
3  6 + 4 3 = 3  6 + 12
Now the addition and then the subtraction.
Penny
