Answer:
If we have 8 * x + y + y:
We have to first substitute in x and y where they should be:
=> 8 * 9 + 10 + 10
According to the order of operations(PEMDAS(parenthesis, exponents, multiplication, division, addition, subtraction, multiplication and division is you go from left to right order, and same with addition and subtraction.)), we do the multiplication first(8*9):
=> 72 + 10 + 10
Now we just add them up:
=> 92
